refactor(db): consolidate ~20+ databases into 2 (mana_platform + mana_sync)

Mirrors the frontend unification (single IndexedDB) on the backend.
All services now use pgSchema() for isolation within one shared database,
enabling cross-schema JOINs, simplified ops, and zero DB setup for new apps.

- Migrate 7 services from pgTable() to pgSchema(): mana-user (usr),
  mana-media (media), todo, traces, presi, uload, cards
- Update all DATABASE_URLs in .env.development, docker-compose, configs
- Rewrite init-db scripts for 2 databases + 12 schemas
- Rewrite setup-databases.sh for consolidated architecture
- Update shared-drizzle-config default to mana_platform
- Update CLAUDE.md with new database architecture docs

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/shared-drizzle-config/src/index.ts

@@ -3,9 +3,9 @@ import { defineConfig, type Config } from 'drizzle-kit';
 export interface DrizzleConfigOptions {
 	/**
 	 * Database name for fallback URL when DATABASE_URL is not set
-	 * Example: 'calendar' -> postgresql://manacore:devpassword@localhost:5432/calendar
+	 * @default 'mana_platform'
 	 */
-	dbName: string;
+	dbName?: string;
 
 	/**
 	 * Path to schema file(s)
@@ -82,7 +82,7 @@ const DEFAULT_PG_PASSWORD = 'devpassword';
  */
 export function createDrizzleConfig(options: DrizzleConfigOptions): Config {
 	const {
-		dbName,
+		dbName = 'mana_platform',
 		schemaPath = './src/db/schema/index.ts',
 		outDir = './src/db/migrations',
 		envVar = 'DATABASE_URL',