v0.152.0

BREAKING CHANGE

• the tenant.id span attribute and the TENANT_ID setting are
  removed. Attribute traces by resource.k8s.namespace.name instead. TENANT_ID
  may still be set in the environment; the application now ignores it.

Fix

• observability: guard POD_* env wiring, drop stale TENANT_ID doc
• observability: never let profiling crashloop the ingest worker

Refactor

• cli: extract the ingest worker run loop; use monkeypatch in tests