…che smoothing

Narrow fix for the interaction between #362 (cache-aware routing noise
protection) and #408 (deferred proactive compaction). The issue: when
incremental evaluation returns 'no compaction needed' due to hot-cache
budget-headroom or hot-cache-defer (routing-noise suppression), deferred
Anthropic sessions were incorrectly terminating their maintenance debt
instead of continuing to execute after the prompt-cache TTL had expired.

The fix: check whether deferred Anthropic sessions should override the
cache-aware 'no compaction' decision once the TTL-safe hold has elapsed.
If so, allow leaf compaction to execute despite the routing-noise
hysteresis. Inline and non-deferred paths keep existing behavior unchanged.

- Adds shouldForceDeferredAnthropicLeafCompaction() to gate override
- Routes deferred Anthropic leaf compaction through executeLeafCompactionCore
  when TTL is stale
- Adds regression test: 'assemble() still executes deferred Anthropic
  leaf debt after TTL expiry when cache smoothing remains effectively hot'
- No changes to routing-noise protection or incremental evaluation logic

Fixes: #408
Related: #362

When deferred Anthropic leaf debt overrides hot-cache smoothing after the prompt-cache TTL expires, run the leaf compaction with the cold-cache catch-up envelope instead of the original hot-cache single-pass settings. This preserves the intended deferred recovery behavior and prevents the maintenance record from being cleared after a single underpowered pass.\n\nAdd a regression that proves the stale-TTL override enables catch-up execution rather than reusing the hot-cache defer envelope, and update the existing stale-TTL test to assert the new execution parameters.\n\nRegeneration-Prompt: |\n  Address the review finding on PR #434 in lossless-claw. The stale-TTL deferred Anthropic compaction fix should not merely force one hot-cache-sized leaf compaction pass and then clear the maintenance debt. Keep the change narrow and additive inside the deferred-compaction path. When the Anthropic prompt-cache TTL has expired and deferred debt must override cache smoothing, execute with the same catch-up envelope that cold-cache recovery uses, especially the extra pass allowance and condensed-pass setting. Add regression coverage that would fail if the forced path still used maxPasses=1 or allowCondensedPasses=false, and update any stale expectations in the existing TTL-expiry test.