swe_agentic: accept adapter kwarg in __init__ (get_env uniform signature)

Without it get_env('swe_agentic') raised TypeError at env creation --
and the swallowed exception silently degraded the run to SINGLE-TURN
prose generation (421s of model monologue, no container, empty
trajectory). This was the agentic 'run' that looked like it worked.

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

evalharness/agent/envs/swe_agentic.py

@@ -111,7 +111,9 @@ def _docker(args, timeout=300):
 class SWEAgenticEnvironment(Environment):
     """Self-running env: one persistent container per sample."""
 
-    def __init__(self):
+    def __init__(self, adapter=None, **_):
+        # adapter arg: get_env uniform signature (unused here; the adapter
+        # is passed to run_task per sample)
         self.container = ''
 
     # ---- container lifecycle ----