Implement entity submission services for ThrillWiki

- Added BaseEntitySubmissionService as an abstract base for entity submissions.
- Created specific submission services for entities: Park, Ride, Company, RideModel.
- Implemented create, update, and delete functionalities with moderation workflow.
- Enhanced logging and validation for required fields.
- Addressed foreign key handling and special field processing for each entity type.
- Noted existing issues with JSONField usage in Company submissions.

django/api/v1/schemas.py

@@ -1169,3 +1169,120 @@ class TopListListOut(BaseModel):
 class ReorderItemsRequest(BaseModel):
     """Schema for reordering list items."""
     item_positions: dict = Field(..., description="Map of item_id to new_position")
+
+
+# ============================================================================
+# History/Versioning Schemas
+# ============================================================================
+
+class HistoryEventSchema(BaseModel):
+    """Schema for a single history event."""
+    id: int
+    timestamp: datetime
+    operation: str  # 'INSERT' or 'UPDATE'
+    snapshot: dict
+    changed_fields: Optional[dict] = None
+    change_summary: str
+    can_rollback: bool
+    
+    class Config:
+        from_attributes = True
+
+
+class HistoryListResponse(BaseModel):
+    """Response for list history endpoint."""
+    entity_id: UUID
+    entity_type: str
+    entity_name: str
+    total_events: int
+    accessible_events: int
+    access_limited: bool
+    access_reason: str
+    events: List[HistoryEventSchema]
+    pagination: dict
+
+
+class HistoryEventDetailSchema(BaseModel):
+    """Detailed event with rollback preview."""
+    id: int
+    timestamp: datetime
+    operation: str
+    entity_id: UUID
+    entity_type: str
+    entity_name: str
+    snapshot: dict
+    changed_fields: Optional[dict] = None
+    metadata: dict
+    can_rollback: bool
+    rollback_preview: Optional[dict] = None
+    
+    class Config:
+        from_attributes = True
+
+
+class HistoryComparisonSchema(BaseModel):
+    """Response for event comparison."""
+    entity_id: UUID
+    entity_type: str
+    entity_name: str
+    event1: dict
+    event2: dict
+    differences: dict
+    changed_field_count: int
+    unchanged_field_count: int
+    time_between: str
+
+
+class HistoryDiffCurrentSchema(BaseModel):
+    """Response for comparing event with current state."""
+    entity_id: UUID
+    entity_type: str
+    entity_name: str
+    event: dict
+    current_state: dict
+    differences: dict
+    changed_field_count: int
+    time_since: str
+
+
+class FieldHistorySchema(BaseModel):
+    """Response for field-specific history."""
+    entity_id: UUID
+    entity_type: str
+    entity_name: str
+    field: str
+    field_type: str
+    history: List[dict]
+    total_changes: int
+    first_value: Optional[str] = None
+    current_value: Optional[str] = None
+
+
+class HistoryActivitySummarySchema(BaseModel):
+    """Response for activity summary."""
+    entity_id: UUID
+    entity_type: str
+    entity_name: str
+    total_events: int
+    accessible_events: int
+    summary: dict
+    most_changed_fields: Optional[List[dict]] = None
+    recent_activity: List[dict]
+
+
+class RollbackRequestSchema(BaseModel):
+    """Request body for rollback operation."""
+    fields: Optional[List[str]] = None
+    comment: str = ""
+    create_backup: bool = True
+
+
+class RollbackResponseSchema(BaseModel):
+    """Response for rollback operation."""
+    success: bool
+    message: str
+    entity_id: UUID
+    rollback_event_id: int
+    new_event_id: Optional[int]
+    fields_changed: dict
+    backup_event_id: Optional[int]