- pool.js: add pool.on('error') handler — an idle-client error (DB restart /
.215 failover) previously crashed the process (no 'error' listener → throw)
- context tool: project a SAFE_COLUMNS allow-list for resources (never the
monitoring/metadata JSON blobs); also add 'resource' to TABLE (was unhandled)
- applyPendingChange: guard the 'upsert' arm so a non-upsertable entity_type
fails with a clear ValidationError instead of a bare TypeError
Tests: pool_error, context (resource case), pending_extended_actions (guard).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
