docs(spec): the F2 D3 entry says migrate meta lists only blocks that omit the count

Claude-Session: https://claude.ai/code/session_01MT2aGLQQhH8ZsPrgqHMrwz
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

packages/spec/src/migrations/entries/semantic/18.job-retry-policy-without-attempts-refused.ts

@@ -24,8 +24,10 @@ export const entry: SemanticMigration = {
     + 'at `retryPolicy.maxRetries` instead, at `objectstack validate`, `objectstack build` and '
     + '`defineStack`, so under `objectstack lint` too when the config calls it: "a retry block with no '
     + 'attempts is no retry block". The D2 conversion makes the 17 edit wherever the chain '
-    + 'reaches: `objectstack migrate meta` lists every such block in your metadata sources and writes '
-    + 'both pre-17 numbers into it, which keeps the retries the job ran with. Stored jobs keep loading '
+    + 'reaches: `objectstack migrate meta` lists every block in your metadata sources that omits the '
+    + 'count and writes both pre-17 numbers into it, which keeps the retries the job ran with; a block '
+    + 'that writes `maxRetries: 0` it does not list, and you delete that block by hand (or state a '
+    + 'count). Stored jobs keep loading '
     + 'with the same numbers, because every rehydration seam replays the conversion. Decide per job: '
     + 'keep the written count, or delete the block if the job should run once. A block that already '
     + 'states `maxRetries` and omits `backoffMultiplier` is not refused, and its delay is now flat '