Task: update API and Workbench runtime wording

[smithaldon1]

Summary

• Update /health to report source_mode, storage_backend, and connector_mode while retaining simulator_backed only as a deprecated compatibility field.
• Replace Workbench status, recovery, empty-state, evidence, recommendation, and RCA/CAPA wording with external-source runtime guidance.
• Document API/Workbench runtime boundaries and add tests that enforce the new wording.

Closes #240

Test Evidence

• cd apps/web && npm test: 19 passed
• make test: 285 passed, 4 skipped
• make lint: passed
• make typecheck: passed
• cd apps/web && npm run lint: passed
• cd apps/web && npm run typecheck: passed
• cd apps/web && npm run build: passed
• rg -n "simulator-backed|make demo|make demo-data|local simulator-backed API" apps services README.md docs: remaining matches are historical learning-log entries, legacy simulator/runtime transition tests/docs, and intentionally scoped demo/ADR references.

Docs Impact

• Updated services/api/README.md and apps/web/README.md for Docker runtime health metadata and external-source boundaries.
• Updated .env.example for FACTORY_SOURCE_MODE and FACTORY_CONNECTOR_MODE.
• Updated docs/LEARNING_LOG.md with the runtime wording alignment summary.

Follow-up Work

• Task: Add Compose smoke test #241 should add the Compose smoke path that validates the full Demo-Factory -> connector -> Sentinel -> API -> Workbench flow.

[smithaldon1]

Reviewed and approved for merge