fix(netvm): hardcoded dev CDP port refs 9460 -> 9455

Follow-up to 8c39dc3: four scripts hardcoded dev's CDP port instead of
reading netvm-registry.py. Aligned with the corrected registry (9455).

Session: sidechat/dev-cdp-partition

bin/response-harvester.py

@@ -84,7 +84,7 @@ except ImportError:
     HAS_MUSE_HYBRID = False
 
 VALID_AGENTS = ["muse", "pip", "646", "opm", "dev", "def"]
-DEFAULT_PORTS = {"muse": 9410, "pip": 9420, "646": 9430, "opm": 9440, "def": 9450, "dev": 9460}
+DEFAULT_PORTS = {"muse": 9410, "pip": 9420, "646": 9430, "opm": 9440, "def": 9450, "dev": 9455}
 
 # Matches EVERY [RESULT <job_id>] marker in a message (use with finditer, not
 # search). The result text is lazy and stops before the next marker (or end of