Add dd0c/route Dashboard API: analytics, routing rules CRUD, API keys, providers

- GET /api/v1/analytics/summary — 7-day cost savings, latency, routing breakdown
- GET /api/v1/analytics/timeseries — hourly/daily rollups from TimescaleDB continuous aggregates
- GET /api/v1/analytics/models — per-model cost and token breakdown
- CRUD /api/v1/rules — routing rules with priority, match conditions, strategies
- CRUD /api/v1/keys — API key generation (dd0c_ prefix), bcrypt hashing, revocation
- CRUD /api/v1/providers — provider config upsert with encrypted key storage
- GET /api/v1/org — org info
- Role-based access: Owner required for mutations

products/01-llm-cost-router/src/lib.rs

@@ -1,8 +1,8 @@
-mod auth;
-mod config;
-mod data;
-mod proxy;
-mod router;
+pub mod auth;
+pub mod config;
+pub mod data;
+pub mod proxy;
+pub mod router;
 
 pub use auth::{AuthProvider, AuthContext, AuthError, LocalAuthProvider, Role};
 pub use config::AppConfig;