Add dd0c/route project scaffolding: migrations, docker-compose, README

- PostgreSQL schema: orgs, users, api_keys, provider_configs, routing_rules, cost_tables, feature_flags
- TimescaleDB schema: request_events hypertable, hourly/daily continuous aggregates, compression, retention
- docker-compose.yml: postgres, timescaledb, redis for local dev
- README with quick start, architecture overview, pricing tiers
- .env.example, .gitignore

products/01-llm-cost-router/.env.example

@@ -0,0 +1,13 @@
+DATABASE_URL=postgres://dd0c:dd0c@localhost:5432/dd0c
+TIMESCALE_URL=postgres://dd0c:dd0c@localhost:5433/dd0c_telemetry
+REDIS_URL=redis://localhost:6379
+JWT_SECRET=dev-secret-change-me-in-production
+PROXY_PORT=8080
+API_PORT=3000
+AUTH_MODE=local
+GOVERNANCE_MODE=audit
+TELEMETRY_CHANNEL_SIZE=1000
+
+# Provider keys (add yours)
+# OPENAI_API_KEY=sk-...
+# ANTHROPIC_API_KEY=sk-ant-...