handoff: ramble phase 2 shipped, heart containers live on grackle

[kh0pper]

Handoff doc for the reward-economy phase 2 arc, shipped in #339 (4a5c3215, ramble 0.10.0) and deployed to grackle.

Docs-only. Records what shipped, the deploy verification, what is open for Kevin, the follow-ups, and three lessons that cost real rework:

• A wrong-but-checkable justification is worse than none. The asymmetric energy clamp was justified by an ordering claim about SYNCED_TABLES that is false — it is only ever a .includes() allowlist, and _applyEntry applies one entry at a time in arrival order. The design was right, the reason was not, and it had shipped in a code comment where a future reader would check it, find it false, and revert a clamp that prevents permanent energy loss.
• Fixing review findings introduces new ones — three of round 2's four findings were in code written to fix round 1, including a "fresh" fixture cell that was an existing test's own cell.
• Guarding one caller is not guarding the invariant — the first clamp fix protected a cold read while a hotter write path kept truncating.

Also records two operational facts worth not rediscovering: grackle's crow DB is ~/crow/data/crow.db, not ~/.crow/crow.db (which is 0 bytes), while bundles still install under ~/.crow/bundles/; and there is no CI gate for guide-doc i18n parity, contrary to what the plan claimed.