Digest pin comment names both causes of the h6 repin

The candidate-predicate change and the release sweep each move the digest alone (b559789a, d9493bbe); releasing beams and locks
moves nothing.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

tests/Aetheria.Shared.Tests/DeterminismLedgerTests.cs

@@ -43,9 +43,11 @@ public sealed partial class RunStartTests
     // order, ties by shot id, so every commit of a step precedes its applies (it was commit then apply, shot by shot, in fire
     // order). The two parts measured: commit-then-apply split alone a1318ee0, with the arrival sort 55ecd858; the old walk at the
     // h5 head, rebased onto master, still measures 108c93dc, so the rebase and the fire-mode property moved nothing.
-    // Repinned a seventh time, once (h6): Combat is the one owner of the AI's trigger level for an AutoWeapon, and lets go of a held one it
-    // no longer commands (target gone, untracked, another group the pick, Combat ended), where a held gun fired on until a later
-    // step selected its group (55ecd858 before).
+    // Repinned a seventh time, once (h6), for two Combat changes, each of which moves the digest alone (Soul measured them against
+    // 55ecd858, the digest before): a held AutoWeapon stays a candidate between its rounds (the sweep disabled: b559789a), and Combat lets
+    // go of a held weapon it no longer commands (target gone, untracked, another group the pick, Combat ended), where a held gun fired on
+    // until a later step selected its group (the candidate change reverted: d9493bbe). Both together: the digest below. Releasing a beam or a
+    // lock the same way (h7) moved nothing.
     private const string TwoAiPinnedDigest = "85e85c46cfc66693c819dd294ad02f3cd0eae5486c8f152a97e2e2787f854274";
     private const float TwoAiSeconds = 60f;