Add SQLite project database + ComfyUI connector nodes

- db.py: ProjectDB class with SQLite schema (projects, data_files,
  sequences, history_trees), WAL mode, CRUD, import, and query helpers
- api_routes.py: REST API endpoints on NiceGUI/FastAPI for ComfyUI
  to query project data over the network
- project_loader.py: ComfyUI nodes (ProjectLoaderDynamic, Standard,
  VACE, LoRA) that fetch data from NiceGUI REST API via HTTP
- web/project_dynamic.js: Frontend JS for dynamic project loader node
- tab_projects_ng.py: Projects management tab in NiceGUI UI
- state.py: Added db, current_project, db_enabled fields
- main.py: DB init, API route registration, projects tab
- utils.py: sync_to_db() dual-write helper
- tab_batch_ng.py, tab_raw_ng.py, tab_timeline_ng.py: dual-write
  sync calls after save_json when project DB is enabled
- __init__.py: Merged project node class mappings
- tests/test_db.py: 30 tests for database layer
- tests/test_project_loader.py: 17 tests for ComfyUI connector nodes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tab_raw_ng.py

@@ -4,7 +4,7 @@ import json
 from nicegui import ui
 
 from state import AppState
-from utils import save_json, get_file_mtime, KEY_HISTORY_TREE, KEY_PROMPT_HISTORY
+from utils import save_json, sync_to_db, get_file_mtime, KEY_HISTORY_TREE, KEY_PROMPT_HISTORY
 
 
 def render_raw_editor(state: AppState):
@@ -52,6 +52,8 @@ def render_raw_editor(state: AppState):
                             input_data[KEY_PROMPT_HISTORY] = data[KEY_PROMPT_HISTORY]
 
                     save_json(file_path, input_data)
+                    if state.db_enabled and state.current_project and state.db:
+                        sync_to_db(state.db, state.current_project, file_path, input_data)
 
                     data.clear()
                     data.update(input_data)