feat: Implement a comprehensive audit log system with a dedicated dashboard page and backend API.

backend/api/v1/modules/a76/audit_log/schemas.py

@@ -0,0 +1,52 @@
+"""
+Audit Log Schemas
+"""
+
+from typing import Optional, List, Any, Dict
+from datetime import date as date_type, time as time_type, datetime
+from pydantic import BaseModel, Field
+
+# --- Response Schemas ---
+
+class AuditLogResponse(BaseModel):
+    """
+    Standard response showing the Legacy columns
+    """
+    spec_id: int
+    reference: str
+    procedure: str
+    movement: str
+    username: str
+    date: date_type
+    time: time_type
+    
+    # Modern extras
+    timestamp: datetime
+    system: str
+    operation_type: Optional[str] = None
+    table_name: Optional[str] = None
+    record_id: Optional[str] = None
+    
+    class Config:
+        from_attributes = True
+
+class AuditLogDetailResponse(AuditLogResponse):
+    """
+    Detailed response including changed values
+    """
+    old_values: Optional[Dict[str, Any]] = None
+    new_values: Optional[Dict[str, Any]] = None
+    changed_fields: Optional[List[str]] = None
+    ip_address: Optional[str] = None
+    execution_time_ms: Optional[int] = None
+
+# --- List Response ---
+
+class AuditLogListResponse(BaseModel):
+    """
+    Paginated response
+    """
+    data: List[AuditLogResponse]
+    total: int
+    page: int
+    page_size: int