feat(llm): rename inference services dropping 'default' from names

frank-default-large -> frank-large (Dankclaw :7770), frank-default-small ->
frank-small (Dankserver :7770), frank-default-sightsound -> frank-npu
(Dankclaw :7771). Units, env files, serve scripts, deploy-plan mappings,
deploy-remote dispatch (stop/disable old units + relink + enable new), and the
test seams move together. Retired frank-default-npu.* artifacts moved to
scripts/.AGENTTRASH/ (tracked-in-history; ignored on disk).

Served aliases become frank-large / frank-small via --alias; the NPU endpoint
serves the whole FLM registry, so its rename changes no served tags.

scripts/bench-threads-batch-http.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 """
-HTTP-based prefill-throughput sweep for frank-default-large.
+HTTP-based prefill-throughput sweep for frank-large.
 Starts the server with a given --threads-batch value, sends a 64K-prompt via
 the chat API (max_tokens=0), measures prompt_tokens/wall_time.
 
@@ -39,7 +39,7 @@ def send_prefill_request():
     with open(PROMPT_FILE, "r") as f:
         prompt = f.read()
     body = json.dumps({
-        "model": "frank-default-large",
+        "model": "frank-large",
         "messages": [{"role": "user", "content": prompt}],
         "max_tokens": 1,
         "stream": False