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- Historical references to the OLD frank-small (FreeToken/CUDA on the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/frank-large-rocmfpx-q8agent-mtp.md

@@ -162,7 +162,7 @@ Three traps, all hit for real:
    enough for the vision probe).
 2. **`MTP boundary missing for seq_id=… ; resyncing after a non-token step`**
    appears in the log under draft resets. Self-recovering; not an outage signal.
-3. **Never `pkill -f llama-server` on Dankclaw** — frank-small is also a
+3. **Never `pkill -f llama-server` on Dankclaw** — frank-secondary is also a
    `llama-server`. The sweep key here is the payload name:
    `pkill -f 'Qwen3.8-27B-Q8_0_ROCMFPX_AGENT'`.