rename frank-small → frank-secondary (Dankclaw llama.cpp :7771)

Cross-cutting rename of the current llama.cpp endpoint on the RTX 3090
(port 7771) from frank-small to frank-secondary:

- Service trio: scripts/{frank-small.env,frank-small.service,
  serve-frank-small.sh,download-frank-small.sh} → frank-secondary.*
- Test: tests/frank_small_unit.bats → tests/frank_secondary_unit.bats
- Runbooks: serverAppConfigs-docs/LLM/frank-small-*.md →
  frank-secondary-*.md (9 files); the FreeToken runbook stays
  freetoken-frank-small.md (it documents the retired CUDA-era service)
- Identifiers: FRANK_SMALL→FRANK_SECONDARY, llm_small→llm_secondary,
  LLM_SMALL_*→LLM_SECONDARY_*, deploy_llm_small→deploy_llm_secondary
- Historical references to the OLD frank-small (FreeToken/CUDA on the
  3090, and the Dankserver service that became frank-medium) are
  preserved verbatim — they describe what the service was called
  at the time.

serverAppConfigs-docs/LLM/Pipeline Parallelism/Qwen3.8 PP Deployment.md

@@ -48,10 +48,10 @@ state, verified against the live journal and output smoke tests
 
 The PP pair is the only inference service enabled for boot. Both units
 (`frank-large` on Dankclaw, `frank-pp-worker` on Dankserver) are
-enabled. The NPU unit (`frank-small` on Dankclaw) and all retired
+enabled. The NPU unit (`frank-secondary` on Dankclaw) and all retired
 units are disabled. Restart order: worker first, then head. The Dankserver
 helper `frank-restart-small.sh` is obsolete (it restarts the removed
-`frank-small` unit); restart the worker with
+`frank-secondary` unit); restart the worker with
 `sudo systemctl restart frank-pp-worker`. The Dankclaw helper
 `frank-restart-large.sh` (sync + cache drop + restart) is correct for the
 head. `deploy.sh dankserver` is broken until retargeted. See