refactor(docker): drop legacy supervise_container_name alias

Supervise runs inside the sidecar bundle (PRD 0024), not in its own
container. The `claude-bottle-supervise-<slug>` per-sidecar name only
existed as a docker-network alias on the bundle so legacy code paths
that referenced the old name would still resolve. Nothing inside the
project relies on that resolution anymore — the short `supervise`
alias is the one all consumers use — so the legacy long-form is dead.

Drops the function entirely, plus its registration as a network alias
and as an orphan probe in prepare.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/unit/test_compose.py

@@ -325,7 +325,6 @@ class TestSidecarBundleShape(unittest.TestCase):
         aliases = set(sc["networks"]["internal"]["aliases"])
         self.assertIn(f"claude-bottle-git-gate-{SLUG}", aliases)
         self.assertIn("supervise", aliases)
-        self.assertIn(f"claude-bottle-supervise-{SLUG}", aliases)
 
     def test_daemons_csv_lists_only_active(self):
         # Egress + pipelock are always in the daemon set even when