[EPIC] RC2: Testnet Operations


**Epic Goal:** Enable testnet token distribution and testing.

**Scope:** Build faucet service with rate limiting and anti-abuse protection. 

**Success Criteria:**
- ✅ Faucet distributes tokens reliably
- ✅ Rate limiting prevents abuse
- ✅ Usage tracked and auditable

**Dependencies:** Requires RC1 transaction system (#39/#42)
        