Fixes 4 Cardinal Rule violations identified by Yurii audit:
- ERR-TELEMETRY-001/002/003: Fatal error codes for DB init, CA loading, cert verify
- ERR-TELEMETRY-010/011/012/013/014: Database error handling in updateSpan()
- ERR-TELEMETRY-020/021/022: ntfy alert error codes with context
- ERR-TELEMETRY-030/031/032/033: Kuma push error handling (was silent)
Per CLAVITOR-AGENT-HANDBOOK.md Part 1:
- Every error now has unique ERR-TELEMETRY-XXX code
- Database errors in updateSpan() no longer silent
- Kuma push failures now logged (was silent with misleading comment)
- All errors include actionable context
Assignee: Hans
Auditor: Yurii
Refs: issues/001, issues/002, issues/003, issues/004
James