docs: sync documentation with codebase

Fixes identified by doc-guardian audit:

Critical fixes:
- DATABASE_SCHEMA.md: Fix staging model name stg_police__crimes → stg_toronto__crime
- DATABASE_SCHEMA.md: Update mart model names to match actual dbt models
- CLAUDE.md: Fix errors/ description (no handlers module exists)
- scripts/etl/toronto.sh: Fix parser module references to actual modules

Stale fixes:
- CONTRIBUTING.md: Add make typecheck, test-cov; fix make ci description
- PROJECT_REFERENCE.md: Document services/, callback modules, all Makefile targets
- CLAUDE.md: Expand Makefile commands, add plugin documentation

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/CONTRIBUTING.md

@@ -50,9 +50,11 @@ The app runs at `http://localhost:8050`.
 
 ```bash
 make test       # Run tests
+make test-cov   # Run tests with coverage
 make lint       # Check code style
 make format     # Auto-format code
-make ci         # Run all checks (lint + test)
+make typecheck  # Run mypy type checker
+make ci         # Run all checks (lint, typecheck, test)
 make dbt-run    # Run dbt transformations
 make dbt-test   # Run dbt tests
 ```
@@ -247,13 +249,23 @@ def layout(slug: str = "") -> dmc.Container:
 To add the page to the sidebar, edit `portfolio_app/components/sidebar.py`:
 
 ```python
-NAV_ITEMS = [
-    {"label": "Home", "href": "/", "icon": "tabler:home"},
-    {"label": "Your Page", "href": "/your-page", "icon": "tabler:star"},
+# For main pages (Home, About, Blog, etc.)
+NAV_ITEMS_MAIN = [
+    {"path": "/", "icon": "tabler:home", "label": "Home"},
+    {"path": "/your-page", "icon": "tabler:star", "label": "Your Page"},
+    # ...
+]
+
+# For project/dashboard pages
+NAV_ITEMS_PROJECTS = [
+    {"path": "/projects", "icon": "tabler:folder", "label": "Projects"},
+    {"path": "/your-dashboard", "icon": "tabler:chart-bar", "label": "Your Dashboard"},
     # ...
 ]
 ```
 
+The sidebar uses icon buttons with tooltips. Each item needs `path`, `icon` (Tabler icon name), and `label` (tooltip text).
+
 ### URL Routing Summary
 
 | File Location | URL |