Make the hash-floor gate deterministic (V-718)

Owner explicitly requested direct commits to master. Keep startup cost benchmarked without turning ambient race/coverage load into a correctness failure; record live reminder proof, stale-task reconciliation, and the temporary delegation quota caveat.

docs/caveats/workers.md

@@ -11,3 +11,14 @@ scan, not this.
 Revisit when: Nexus gets slow, or when a batch-resolution endpoint exists.
 Workaround: an unreachable Nexus is fine. It is the slow-but-answering case
 that hurts.
+
+## Autonomous worker delegation is temporarily quota-gated [#714] {#agent-quota}
+
+Costs: the completion session can still inspect, implement and verify Maven,
+but cannot parallelise independent audits after the three available workers
+all returned the shared Codex usage-limit error. This is an orchestration
+constraint, not a Maven runtime failure, and no repository workaround can add
+worker capacity.
+Revisit when: the reported quota window reopens on 2026-08-20, or the account's
+worker allowance changes. Until then, keep work streams serial and record the
+same verification evidence a delegated review would have produced.