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>

claude_bottle/supervise.py

@@ -21,8 +21,8 @@ to the agent.
 This module defines the host-side library: dataclasses for the queue
 file shapes, queue read/write helpers, the audit log writer, and the
 diff renderer. The in-container sidecar lives in
-claude_bottle/supervise_server.py; the Docker lifecycle in
-claude_bottle/backend/docker/supervise.py.
+claude_bottle/supervise_server.py; the supervise daemon's container
+lifecycle is owned by the sidecar bundle (PRD 0024).
 
 For 0013 the supervisor's approval handlers are deliberately no-ops:
 on approval the audit log is written and the response file is