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>

services/mana-analytics/drizzle.config.ts

@@ -6,7 +6,7 @@ export default defineConfig({
 	dialect: 'postgresql',
 	dbCredentials: {
 		url:
-			process.env.DATABASE_URL || 'postgresql://manacore:devpassword@localhost:5432/mana_analytics',
+			process.env.DATABASE_URL || 'postgresql://manacore:devpassword@localhost:5432/mana_platform',
 	},
 	schemaFilter: ['feedback'],
 });

services/mana-analytics/src/config.ts

@@ -13,7 +13,7 @@ export function loadConfig(): Config {
 		port: parseInt(env('PORT', '3064'), 10),
 		databaseUrl: env(
 			'DATABASE_URL',
-			'postgresql://manacore:devpassword@localhost:5432/mana_analytics'
+			'postgresql://manacore:devpassword@localhost:5432/mana_platform'
 		),
 		manaAuthUrl: env('MANA_CORE_AUTH_URL', 'http://localhost:3001'),
 		manaLlmUrl: env('MANA_LLM_URL', 'http://localhost:3025'),