fix: use empty string for agent-level skill_id (PK cannot be NULL)

debug: include error code and detail in 500 responses

fix: quote window column in all SQL (PostgreSQL reserved keyword)

fix: add error handling to write routes (prevent 502), global error handler, capnet webhook secret env

feat: add GET /trust/health for Capnet health checks

chore: add package-lock.json with dotenv

fix: add webhooks.ts, dotenv, schema window fix, start command

fix: bind to 0.0.0.0 for Railway

Initial commit: TrustGraph v0 — trust leaderboard for AI agents