fix: resolve CI/CD linting and formatting issues

- Replaced deprecated typing.Dict/List/Tuple with native types (UP035)
- Removed unused imports across all modules
- Fixed unused variables by replacing with _ prefix
- Added missing Optional type imports
- Reorganized imports for proper sorting (I001)
- Applied black formatting to all source files

loglens/analyzers/severity.py

@@ -1,12 +1,13 @@
-"""Severity classification for log entries."""
+'''Severity classification for log entries.'''
 
 from dataclasses import dataclass
 from enum import Enum
-from typing import Any, Dict, List, Optional
+from typing import Any, Optional
 
 
 class SeverityLevel(Enum):
-    """Severity levels for log entries."""
+    '''Severity levels for log entries.'''
+
     CRITICAL = "critical"
     ERROR = "error"
     WARNING = "warning"
@@ -16,7 +17,7 @@ class SeverityLevel(Enum):
 
     @classmethod
     def from_string(cls, level: str) -> "SeverityLevel":
-        """Convert string to SeverityLevel."""
+        '''Convert string to SeverityLevel.'''
         level_lower = level.lower()
         for member in cls:
             if member.value == level_lower:
@@ -24,19 +25,19 @@ class SeverityLevel(Enum):
         return cls.UNKNOWN
 
     def score(self) -> int:
-        """Get numeric score for severity."""
+        '''Get numeric score for severity.'''
         scores = {
             SeverityLevel.CRITICAL: 5,
             SeverityLevel.ERROR: 4,
             SeverityLevel.WARNING: 3,
             SeverityLevel.INFO: 2,
             SeverityLevel.DEBUG: 1,
-            SeverityLevel.UNKNOWN: 0
+            SeverityLevel.UNKNOWN: 0,
         }
         return scores.get(self, 0)
 
     def __lt__(self, other: "SeverityLevel") -> bool:
-        """Compare severity levels."""
+        '''Compare severity levels.'''
         return self.score() < other.score()
 
     def __le__(self, other: "SeverityLevel") -> bool:
@@ -51,16 +52,17 @@ class SeverityLevel(Enum):
 
 @dataclass
 class SeverityRule:
-    """Rule for severity classification."""
+    '''Rule for severity classification.'''
+
     name: str
-    patterns: List[str]
+    patterns: list[str]
     severity: SeverityLevel
     weight: int = 1
     description: str = ""
 
 
 class SeverityClassifier:
-    """Classifies log entries by severity."""
+    '''Classifies log entries by severity.'''
 
     DEFAULT_RULES = [
         SeverityRule(
@@ -68,57 +70,59 @@ class SeverityClassifier:
             patterns=["fatal", "segfault", "panic", "core dumped", "critical system failure"],
             severity=SeverityLevel.CRITICAL,
             weight=10,
-            description="Critical system failures"
+            description="Critical system failures",
         ),
         SeverityRule(
             name="error_keywords",
             patterns=["error", "exception", "failed", "failure", "timeout", "cannot", "unable"],
             severity=SeverityLevel.ERROR,
             weight=5,
-            description="General errors"
+            description="General errors",
         ),
         SeverityRule(
             name="warning_keywords",
             patterns=["warning", "warn", "deprecated", "deprecation"],
             severity=SeverityLevel.WARNING,
             weight=3,
-            description="Warnings and deprecations"
+            description="Warnings and deprecations",
         ),
         SeverityRule(
             name="info_keywords",
             patterns=["info", "notice", "started", "stopped", "loaded"],
             severity=SeverityLevel.INFO,
             weight=1,
-            description="Informational messages"
+            description="Informational messages",
         ),
         SeverityRule(
             name="debug_keywords",
             patterns=["debug", "trace", "verbose"],
             severity=SeverityLevel.DEBUG,
             weight=0,
-            description="Debug and trace messages"
+            description="Debug and trace messages",
         ),
     ]
 
-    def __init__(self, custom_rules: Optional[List[Dict[str, Any]]] = None):
+    def __init__(self, custom_rules: Optional[list[dict[str, Any]]] = None):
-        self.rules: List[SeverityRule] = self.DEFAULT_RULES.copy()
+        self.rules: list[SeverityRule] = self.DEFAULT_RULES.copy()
         if custom_rules:
             self._load_custom_rules(custom_rules)
 
-    def _load_custom_rules(self, rules: List[Dict[str, Any]]) -> None:
+    def _load_custom_rules(self, rules: list[dict[str, Any]]) -> None:
-        """Load custom severity rules."""
+        '''Load custom severity rules.'''
         for rule_data in rules:
             rule = SeverityRule(
                 name=rule_data.get("name", "custom"),
                 patterns=rule_data.get("patterns", []),
                 severity=SeverityLevel.from_string(rule_data.get("severity", "info")),
                 weight=rule_data.get("weight", 1),
-                description=rule_data.get("description", "")
+                description=rule_data.get("description", ""),
             )
             self.rules.append(rule)
 
-    def classify(self, level: Optional[str], message: str = "", pattern_match: Optional[str] = None) -> SeverityLevel:
+    def classify(
-        """Classify severity based on level, message, and pattern."""
+        self, level: Optional[str], message: str = "", pattern_match: Optional[str] = None
+    ) -> SeverityLevel:
+        '''Classify severity based on level, message, and pattern.'''
         score = 0
         matched_severity = SeverityLevel.UNKNOWN
 
@@ -159,8 +163,10 @@ class SeverityClassifier:
 
         return SeverityLevel.INFO
 
-    def classify_with_details(self, level: Optional[str], message: str = "", pattern_match: Optional[str] = None) -> Dict[str, Any]:
+    def classify_with_details(
-        """Classify severity with detailed information."""
+        self, level: Optional[str], message: str = "", pattern_match: Optional[str] = None
+    ) -> dict[str, Any]:
+        '''Classify severity with detailed information.'''
         severity = self.classify(level, message, pattern_match)
 
         text = f"{message} {pattern_match or ''}".lower()
@@ -169,33 +175,41 @@ class SeverityClassifier:
         for rule in self.rules:
             for pattern in rule.patterns:
                 if pattern.lower() in text:
-                    matched_rules.append({
+                    matched_rules.append(
-                        "rule": rule.name,
+                        {
-                        "pattern": pattern,
+                            "rule": rule.name,
-                        "severity": rule.severity.value,
+                            "pattern": pattern,
-                        "weight": rule.weight
+                            "severity": rule.severity.value,
-                    })
+                            "weight": rule.weight,
+                        }
+                    )
 
         return {
             "severity": severity,
             "matched_rules": matched_rules,
-            "confidence": min(1.0, len(matched_rules) * 0.3) if matched_rules else 0.5
+            "confidence": min(1.0, len(matched_rules) * 0.3) if matched_rules else 0.5,
         }
 
-    def get_severity_order(self) -> List[SeverityLevel]:
+    def get_severity_order(self) -> list[SeverityLevel]:
-        """Get severity levels in order from highest to lowest."""
+        '''Get severity levels in order from highest to lowest.'''
         return sorted(
-            [SeverityLevel.CRITICAL, SeverityLevel.ERROR, SeverityLevel.WARNING,
+            [
-             SeverityLevel.INFO, SeverityLevel.DEBUG, SeverityLevel.UNKNOWN],
+                SeverityLevel.CRITICAL,
-            reverse=True
+                SeverityLevel.ERROR,
+                SeverityLevel.WARNING,
+                SeverityLevel.INFO,
+                SeverityLevel.DEBUG,
+                SeverityLevel.UNKNOWN,
+            ],
+            reverse=True,
         )
 
     def add_rule(self, rule: SeverityRule) -> None:
-        """Add a custom rule."""
+        '''Add a custom rule.'''
         self.rules.append(rule)
 
     def remove_rule(self, name: str) -> bool:
-        """Remove a rule by name."""
+        '''Remove a rule by name.'''
         for i, rule in enumerate(self.rules):
             if rule.name == name:
                 self.rules.pop(i)