feat: rename keep-notes to memento-note, migrate to PostgreSQL, fix MCP bugs

- Rename directory keep-notes -> memento-note with all code references
- Prisma: SQLite -> PostgreSQL (both app and MCP server schemas)
- Sync MCP schema with main app (add missing fields, relations, indexes)
- Delete 17 SQLite migrations (clean slate for PostgreSQL)
- Remove SQLite dependencies (@libsql/client, better-sqlite3, etc.)
- Fix MCP server: hardcoded Windows DB paths -> DATABASE_URL env var
- Fix MCP server: .dockerignore excluded index-sse.js (SSE mode broken)
- MCP Dockerfile: node:20 -> node:22
- Docker Compose: add postgres service, remove SQLite volume
- Generate favicon.ico, icon-192.png, icon-512.png, apple-icon.png
- Update layout.tsx icons and manifest.json for PNG icons
- Update all .env files for PostgreSQL
- Rewrite README.md with updated sections
- Remove mcp-server/node_modules and prisma/client-generated from git tracking

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

memento-note/scripts/check-users.ts

@@ -0,0 +1,25 @@
+
+import { prisma } from '../lib/prisma'
+
+async function main() {
+    console.log('🔍 Checking users in database...')
+    console.log('Database URL used:', process.env.DATABASE_URL || "file:./dev.db")
+
+    const users = await prisma.user.findMany()
+
+    if (users.length === 0) {
+        console.log('❌ No users found in database!')
+    } else {
+        console.log(`✅ Found ${users.length} users:`)
+        console.table(users.map(u => ({
+            email: u.email,
+            role: u.role,
+            id: u.id,
+            hasPassword: !!u.password
+        })))
+    }
+}
+
+main()
+    .catch(e => console.error(e))
+    .finally(async () => await prisma.$disconnect())