fix(tests): the rule-33 contract follows the scope key into the shared helper (#4085)

Two interface-contract tests read each hook's own source for the query args it
sends. The project-scope key now comes from scribe_scope_query, so `repo=` was
no longer spelled in the hook and both read that as the hook having stopped
sending it.

They now pin the pair: the hook delegates to the helper, and the helper emits
exactly `repo=` and `project_id=`. That is a stronger assertion than the one it
replaces — it catches a hook rolling its own scope resolution again, and it
pins the new key, which the route must read for a non-git session to reach its
project at all.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01821k5B3Ysecp9fNYs92Kuy

tests/test_write_path_trigger.py

@@ -931,10 +931,16 @@ def test_route_reads_every_arg_the_hook_sends():
         assert f'request.args.get("{arg}"' in src, f"route ignores {arg}"
 
     hook = HOOK.read_text()
-    for arg in ("path=", "code=", "repo=", "exclude_ids=", "exclude_sync_ids=",
-                "shapes="):
+    for arg in ("path=", "code=", "exclude_ids=", "exclude_sync_ids=", "shapes="):
         assert arg in hook, f"hook never sends {arg}"
 
+    # The project-scope key is no longer spelled in the hook: since #4085 it is
+    # whichever of `repo=` / `project_id=` scribe_scope_query picks, so the hook
+    # splices in its output and the helper is the other half of the contract.
+    assert "scribe_scope_query" in hook, "hook no longer asks for a project scope"
+    defs = (HOOK.parent / "scribe_defs.sh").read_text()
+    assert set(re.findall(r"printf '([a-z_]+)=", defs)) == {"repo", "project_id"}
+
 
 def test_route_resolves_repo_to_a_project_not_to_a_location_filter():
     """A snippet's `repo` is a label the operator typed; the hook sends a git