docs(scripts): make check-agent-model-declared's header claim itself as the home of the model-resolution order (#14689)

The header's parenthetical still said "see `.claude/agents/os-dev.md` for the
full order and both adjacent traps". That file's model-pin comment is now a
two-line pointer back at this header, so the two comments pointed at each
other and neither claimed to be the home.

The header already documents everything the deferral promised: the full
four-step resolution order above, the env var outranking every other step
including this gate's own pin, and the org-allowlist fallback landing on the
INHERITED model in the next paragraph. So the sentence now names both
adjacent traps in place and states that os-dev.md carries only the
`model: opus` pin plus a pointer here.

Comment-only; no behaviour change.


Claude-Session: https://claude.ai/code/session_01LraLgQVGq8egUwfYZpbYt1

Co-authored-by: Claude <noreply@anthropic.com>

Author: os-litant

scripts/check-agent-model-declared.mjs

@@ -11,8 +11,10 @@
 // model does this role run on" a property of whoever happened to dispatch it, at
 // whatever moment their own session was on, rather than a property of the role —
 // and it changes with no signal, mid-term, invisibly. (`CLAUDE_CODE_SUBAGENT_MODEL`
-// outranks every other step, including this gate's own pin — see
-// `.claude/agents/os-dev.md` for the full order and both adjacent traps.)
+// outranks every other step, including this gate's own pin — the first of the two
+// adjacent traps; the allowlist fallback below is the second. This header is the
+// home of that full order and of both traps, and `.claude/agents/os-dev.md` carries
+// only the `model: opus` pin plus a pointer back here.)
 //
 // A second, smaller nuance in that same order: a value blocked by the
 // organization's `availableModels` allowlist does NOT fall back to the frontmatter