fix(delegation): audit-log root follows the registry (Issue #57)

get_logs_dir(registry_dir) resolves the audit-log root as the
delegate_job_logs next to the registry in use when DELEGATE_JOB_LOGS_DIR
is not set; sibling_logs_dir() is the pure sibling rule. Every writer and
reader that knows its registry (registry, engine, publish_event, remote,
job_subscriber, reconcile.sh, the loop runner's fingerprint exclusion)
passes that root instead of falling back to the workspace default.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

.agents/skills/lib_py/loop/runner.py

@@ -26,6 +26,7 @@ from pathlib import Path
 from typing import Any, Dict, List, Optional, Set, Tuple
 
 from lib_py import ints
+from lib_py.delegation import mqtt_common
 from lib_py.delegation import registry as job_registry
 from lib_py.loop import checkpoint, eager, parser
 
@@ -1083,7 +1084,7 @@ class LoopRunner:
         if not head:
             return None
         root = self.worktree_root.resolve()
-        logs = Path(os.environ.get("DELEGATE_JOB_LOGS_DIR") or self.mam_dir / "delegate_job_logs")
+        logs = Path(mqtt_common.get_logs_dir(str(self.jobs_dir)))
         exclude = []
         for d in (self.mam_dir, self.jobs_dir, self.workspace_root / logs):
             try: