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/seed-user.ts

@@ -0,0 +1,22 @@
+import { PrismaClient } from '@prisma/client'
+import bcrypt from 'bcryptjs'
+
+const prisma = new PrismaClient()
+
+async function main() {
+  const hashedPassword = await bcrypt.hash('password123', 10)
+  const user = await prisma.user.upsert({
+    where: { email: 'test@example.com' },
+    update: {},
+    create: {
+      email: 'test@example.com',
+      name: 'Test User',
+      password: hashedPassword,
+    },
+  })
+  console.log('User created:', user)
+}
+
+main()
+  .catch(e => console.error(e))
+  .finally(async () => await prisma.$disconnect())