fix: align MCP server schema with memento-note + per-request user isolation

- Remove `embedding` column from MCP Note model (dropped by migration 20260425120000)
- Add missing columns: trashedAt, dismissedFromRecent, contentUpdatedAt, cardSizeMode
- Add NoteEmbedding model and Label.notebook relation
- Use AsyncLocalStorage to pass authenticated userId from API key to tool handlers
- Enable SSE mode and auth in docker-compose for N8N integration

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

mcp-server/tools.js

@@ -18,6 +18,7 @@ import {
   ListToolsRequestSchema,
   McpError,
 } from '@modelcontextprotocol/sdk/types.js';
+import { requestContext } from './request-context.js';
 
 // ─── Configuration ─────────────────────────────────────────────────────────
 
@@ -603,22 +604,30 @@ const toolDefinitions = [
  * @param {string} [options.appBaseUrl] - Optional base URL of the Next.js app for AI API calls
  */
 export function registerTools(server, prisma, options = {}) {
-  const { userId = null, appBaseUrl = null } = options;
+  const { appBaseUrl = null } = options;
+
+  // Resolve userId per-request from AsyncLocalStorage (set by auth middleware)
+  const getResolvedUserId = () => {
+    const store = requestContext.getStore();
+    return store?.userId || null;
+  };
+
+  // Fallback: auto-detect first user when no auth context
+  let fallbackUserId = null;
+  let fallbackPromise = null;
 
-  // Resolve userId: if not provided, auto-detect the first user
-  let resolvedUserId = userId;
-  let userIdPromise = null;
-  
   const ensureUserId = async () => {
-    if (resolvedUserId) return resolvedUserId;
-    if (userIdPromise) return userIdPromise;
-    
-    userIdPromise = prisma.user.findFirst({ select: { id: true } }).then(u => {
-      if (u) resolvedUserId = u.id;
-      return resolvedUserId;
+    const fromContext = getResolvedUserId();
+    if (fromContext) return fromContext;
+    if (fallbackUserId) return fallbackUserId;
+    if (fallbackPromise) return fallbackPromise;
+
+    fallbackPromise = prisma.user.findFirst({ select: { id: true } }).then(u => {
+      if (u) fallbackUserId = u.id;
+      return fallbackUserId;
     });
-    
-    return userIdPromise;
+
+    return fallbackPromise;
   };
 
   // ── List Tools ────────────────────────────────────────────────────────────
@@ -629,6 +638,7 @@ export function registerTools(server, prisma, options = {}) {
   // ── Call Tools ────────────────────────────────────────────────────────────
   server.setRequestHandler(CallToolRequestSchema, async (request) => {
     const { name, arguments: args } = request.params;
+    const resolvedUserId = getResolvedUserId();
 
     try {
       switch (name) {