Phase 4 of RFC #308: Stateful Sense refactor.
- CLAUDE.md: updated diagram, tables, examples (no more Signal)
- Cleaned stale Signal Bus / DrizzleDB / _signals / retention refs
across READMEs, .cursor rules, copilot instructions, .knowledge
- Removed drizzle-orm from core package.json (no longer used)
- Updated pnpm-lock.yaml
Refs #308
BREAKING CHANGE: NerveConfig no longer has 'reflexes' field.
SenseReflexConfig/ReflexConfig types removed.
Config with top-level 'reflexes' array now errors instead of migrating.
Use sense-level 'interval' and 'on' fields instead.
- Remove reflexes from NerveConfig type
- Remove legacy parsing, deprecation warning, buildReflexesFromSenses
- Simplify reflex-scheduler to only read sense-level config
- Rename senseTriggerLabelsWithFallback → senseTriggerLabels
- Delete all legacy reflexes test cases
- -639/+114 lines
Fixes#199