Preserve source-authored procedure content

[lucronn]

Closes #101

What changed

• reject cached composed procedures that contain only generated operation labels
• hydrate selected AutoAPI article bodies and retain ordered source instructions, evidence, and figures
• reconcile the dashboard against durable query state while source work continues so the UI does not stop at a stale queued event
• add regression coverage and record browser verification

Verification

• Python worker, enrichment, dev, and contract suites pass
• go test ./... and dashboard JavaScript syntax checks pass
• Browser query 7c8fa284-b5de-556c-9639-2c1ac48fba61 rendered 99 source-backed RAV4 steps and the correlated Workers terminal

User-owned sample data/, output/, and tmp/ remain unstaged.