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/docker-compose.yml

@@ -0,0 +1,50 @@
+# dd0c/route — Local Development
+
+services:
+  postgres:
+    image: postgres:16-alpine
+    environment:
+      POSTGRES_USER: dd0c
+      POSTGRES_PASSWORD: dd0c
+      POSTGRES_DB: dd0c
+    ports:
+      - "5432:5432"
+    volumes:
+      - pg_data:/var/lib/postgresql/data
+      - ./migrations/001_init.sql:/docker-entrypoint-initdb.d/001_init.sql
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U dd0c"]
+      interval: 5s
+      timeout: 3s
+      retries: 5
+
+  timescaledb:
+    image: timescale/timescaledb:latest-pg16
+    environment:
+      POSTGRES_USER: dd0c
+      POSTGRES_PASSWORD: dd0c
+      POSTGRES_DB: dd0c_telemetry
+    ports:
+      - "5433:5432"
+    volumes:
+      - ts_data:/var/lib/postgresql/data
+      - ./migrations/002_timescale.sql:/docker-entrypoint-initdb.d/002_timescale.sql
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U dd0c"]
+      interval: 5s
+      timeout: 3s
+      retries: 5
+
+  redis:
+    image: redis:7-alpine
+    ports:
+      - "6379:6379"
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 5s
+      timeout: 3s
+      retries: 5
+
+volumes:
+  pg_data:
+  ts_data: