fix: comprehensive security, consistency, and dead code cleanup

Security:
- Add auth + file type/size validation to upload API
- Add admin auth to /api/admin/ endpoints
- Add SSRF protection to scrape action
- Whitelist fields in PUT /api/notes/[id] to prevent mass assignment
- Protect /lab, /agents, /chat, /canvas, /notebooks routes in middleware

AI provider fixes:
- Add deepseek/openrouter to factory ProviderType (was silently falling back to ollama)
- Fix title-suggestion.service.ts to use factory instead of hardcoded OpenAI
- Fix getAIProvider→getChatProvider in memory-echo, notebook-summary, agent-executor
- Fix getAIProvider→getTagsProvider in notebook-suggestion, title-suggestions, transform-markdown

Functional bugs:
- Fix ALLOW_REGISTRATION AND→OR logic
- Fix note-editor.tsx passing stale props to useAutoTagging instead of local state
- Fix stale Note.embedding type (migrated to NoteEmbedding table)
- Remove hardcoded SQLite path from prisma.ts

Frontend:
- Add AbortController to useAutoTagging and useTitleSuggestions hooks
- Add error rollback to optimistic UI in note-inline-editor
- Remove stale closure over notebookId/language in useAutoTagging

Cleanup:
- Rename docker-compose from keepnotes→memento
- Remove unused unstable_cache import from config.ts
- Remove dead useUndoRedo hook
- Fix TagSuggestion type (add isNewLabel, reasoning)
- Remove dead AIConfig/AIProviderType types
- Fix ghost-tags unused isEmpty var and as any cast
- Fix note-editor titleSuggestions typed as any[]

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

memento-note/auth.config.ts

@@ -14,11 +14,17 @@ export const authConfig = {
     authorized({ auth, request: { nextUrl } }) {
       const isLoggedIn = !!auth?.user;
       const isAdmin = (auth?.user as any)?.role === 'ADMIN';
-      const isDashboardPage = nextUrl.pathname === '/' || 
-                             nextUrl.pathname.startsWith('/reminders') || 
-                             nextUrl.pathname.startsWith('/archive') || 
+      const isDashboardPage = nextUrl.pathname === '/' ||
+                             nextUrl.pathname.startsWith('/reminders') ||
+                             nextUrl.pathname.startsWith('/archive') ||
                              nextUrl.pathname.startsWith('/trash') ||
-                             nextUrl.pathname.startsWith('/settings');
+                             nextUrl.pathname.startsWith('/settings') ||
+                             nextUrl.pathname.startsWith('/lab') ||
+                             nextUrl.pathname.startsWith('/agents') ||
+                             nextUrl.pathname.startsWith('/chat') ||
+                             nextUrl.pathname.startsWith('/canvas') ||
+                             nextUrl.pathname.startsWith('/notebooks') ||
+                             nextUrl.pathname.startsWith('/note/');
       const isAdminPage = nextUrl.pathname.startsWith('/admin');
 
       if (isAdminPage) {