API Key Authentication & Usage Monitoring

[findolor]

Implement API key authentication, usage monitoring, and rate limiting for the st0x REST API.

API keys use HTTP Basic Auth (Authorization: Basic <base64(api_key:api_secret)>) per the API spec. Keys grant full access to all endpoints. Usage is tracked per-key for monitoring and audit purposes.

v1

• Set up SQLite database layer with sqlx #5 — Set up SQLite database layer with sqlx
• Implement API key + secret authentication #6 — Implement API key + secret authentication
• Implement API key management operations #7 — Implement API key management operations
• Implement request usage tracking #8 — Implement request usage tracking
• Implement global and per-key rate limiting #9 — Implement global and per-key rate limiting

v2

• Implement API key rotation #10 — Implement API key rotation
• Implement admin usage analytics endpoints #11 — Implement admin usage analytics endpoints
• Implement per-key request quotas #12 — Implement per-key request quotas