Add memory_manager source files and tests

src/memory_manager/api/schemas.py

@@ -1,24 +1,27 @@
-"""Pydantic schemas for API."""
+"""Pydantic schemas for API request/response validation."""
+
 from datetime import datetime
-from typing import List, Optional
+from typing import Any
+
 from pydantic import BaseModel, Field
 
+from memory_manager.db.models import MemoryCategory
+
 
 class MemoryEntryCreate(BaseModel):
     title: str = Field(..., min_length=1, max_length=255)
     content: str = Field(..., min_length=1)
-    category: str = Field(...)
-    tags: List[str] = Field(default_factory=list)
-    agent_id: Optional[str] = Field(default="unknown")
-    project_path: Optional[str] = Field(default=".")
-    parent_id: Optional[int] = None
+    category: MemoryCategory
+    tags: list[str] = Field(default_factory=list)
+    agent_id: str | None = None
+    project_path: str | None = None
 
 
 class MemoryEntryUpdate(BaseModel):
-    title: Optional[str] = Field(None, min_length=1, max_length=255)
-    content: Optional[str] = Field(None, min_length=1)
-    category: Optional[str] = None
-    tags: Optional[List[str]] = None
+    title: str | None = Field(None, min_length=1, max_length=255)
+    content: str | None = Field(None, min_length=1)
+    category: MemoryCategory | None = None
+    tags: list[str] | None = None
 
 
 class MemoryEntryResponse(BaseModel):
@@ -26,21 +29,25 @@ class MemoryEntryResponse(BaseModel):
     title: str
     content: str
     category: str
-    tags: List[str]
+    tags: list[str]
     agent_id: str
     project_path: str
-    created_at: datetime
-    updated_at: datetime
-    parent_id: Optional[int] = None
+    created_at: datetime | None
+    updated_at: datetime | None
 
-    class Config:
-        from_attributes = True
+
+class SearchQuery(BaseModel):
+    q: str = Field(..., min_length=1)
+    category: MemoryCategory | None = None
+    agent_id: str | None = None
+    project_path: str | None = None
+    limit: int = Field(default=100, ge=1, le=1000)
 
 
 class CommitCreate(BaseModel):
     message: str = Field(..., min_length=1)
-    agent_id: Optional[str] = Field(default="unknown")
-    project_path: Optional[str] = Field(default=".")
+    agent_id: str | None = None
+    project_path: str | None = None
 
 
 class CommitResponse(BaseModel):
@@ -49,21 +56,24 @@ class CommitResponse(BaseModel):
     message: str
     agent_id: str
     project_path: str
-    created_at: datetime
-
-    class Config:
-        from_attributes = True
+    snapshot: list[dict[str, Any]]
+    created_at: datetime | None
 
 
 class DiffResponse(BaseModel):
-    hash1: str
-    hash2: str
-    added: List[dict]
-    removed: List[dict]
-    modified: List[dict]
+    commit1: dict[str, Any]
+    commit2: dict[str, Any]
+    added: list[dict[str, Any]]
+    removed: list[dict[str, Any]]
+    modified: list[dict[str, Any]]
+
+
+class HealthResponse(BaseModel):
+    status: str
+    version: str
 
 
 class StatsResponse(BaseModel):
     total_entries: int
+    entries_by_category: dict[str, int]
     total_commits: int
-    category_counts: dict