Tighten Undertow Run's early attack pacing

docs/hd-coordinator-checkpoint.md

@@ -6,7 +6,7 @@ Artwork coverage is unchanged at **5,463 frames in 3,625 complete sequences**, i
 
 Focused production checks passed 113 Rust tests and 186 Python tests; 5 existing Rust tests were ignored. Full validation accepts all 5,463 frames with zero rejects, plus 45 mods with one override. Three 1920×1080 SDL controls completed successfully, and Root viewed all three full images. Their PNG, RGB and alpha results matched the SourceE H5463 controls across 6,220,800 pixels, with zero measured changes. These unchanged-art controls do not establish coverage or artwork approval for lists above 128 cells, every optional policy or all placements. The latest closed native Windows result is exact SourceE H5426 at 3f3107d6: 394 passed, 26 ignored and zero failed; no native Windows SourceF execution is claimed.
 
-Original details remain Original rather than generated HD. The longer-list allowance does not repair geometry or material faults, reverse held artwork or establish every placement. Iron Coast's current 45-package resources and Mission 2 version 1.0.2 are unchanged. Exact production and historical authorities are in [runtime release evidence](hd-runtime-release.json). Validated package checkpoint; Git history records publication.
+Original details remain Original rather than generated HD. The longer-list allowance does not repair geometry or material faults, reverse held artwork or establish every placement. At this runtime activation, Iron Coast's 45 packages included Mission 2 version 1.0.2. Subsequent campaign changes are tracked in [Iron Coast retune evidence](iron-coast-retune.md). Exact production and historical authorities are in [runtime release evidence](hd-runtime-release.json). Validated package checkpoint; Git history records publication.
 
 Preserved 17 October 2026 Source-update checkpoint at 5,384 (historical coverage): Current Source C+D checkpoint — 17 October 2026: remote-confirmed commit `a073f73f` installs the rational atlas sampler, protected terrain joins and bounded retained-Original policy. Coverage is unchanged at **5,384 frames / 3,551 sequences**, with **369 originals remaining** (260 Terrain, 75 enemies/ground objects, 33 UI/other, one boss); data remains **9,335 files / 8,179,315,857 bytes**. Both bundled executables were rebuilt. Validation passes 90 Rust and 78 Python tests (five pre-existing Rust checks ignored), all 5,384 HD frames with zero rejects, the 6,449-entry catalog and 45 mods/one override. Three fresh 1080p API-B/C+D controls match exactly across 6,220,800 pixels. Source C+D native Windows CI remains pending; `58723547` separately passed 361 tests, with 26 ignored and zero failed. No new artwork approval or full-HD completion follows. The following pre-C records retain their original epochs.