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- Historical references to the OLD frank-small (FreeToken/CUDA on the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-primary-r9v-radiance-qwen38-q8.md

@@ -55,7 +55,7 @@ would drift from the qualification — don't.
 ## Spec decode: MTP4 only — the ngram-mod ask is NOT expressible
 
 llama.cpp chains drafter types (`--spec-type draft-mtp,ngram-mod` on
-frank-small/large). The fork's `speculative_config` is a **single dict**
+frank-secondary/large). The fork's `speculative_config` is a **single dict**
 (one method per engine): `mtp`, `ngram`, `ngram_gpu`, `dflash`, … are
 mutually exclusive — no chaining seam exists in the fork. What IS active: