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- Historical references to the OLD frank-small (FreeToken/CUDA on the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/Research/Most Popular Self-Hosted AI Apps.md

@@ -107,7 +107,7 @@ TTS), [Kokoro-82M](https://github.com/hexgrad/kokoro) (8,933, Apache-2.0, TTS),
   the `Comfy-Org` org. Already running on this fleet (Qwen-Image 2.1 GGUF) and
   wired as the Open WebUI image engine.
 - **llama.cpp** — the reference GGUF inference engine; `llama-server` exposes an
-  OpenAI-compatible endpoint. Backbone of this fleet's frank-small/frank-large.
+  OpenAI-compatible endpoint. Backbone of this fleet's frank-secondary/frank-large.
 - **vLLM** — high-throughput PagedAttention serving with an OpenAI-compatible
   API; the multi-GPU option (frank-medium runs vLLM tensor-parallel across two
   R9700s).