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- Historical references to the OLD frank-small (FreeToken/CUDA on the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/LLM Bench Windows and Measurement.md

@@ -27,7 +27,7 @@ wedging a host until power cycle. Reference harnesses:
    with `container state improper`.
 2. **Boot the arm as the service, not a scratch port** (no scratch ports on
    LLM hosts — one card, one server). The serve script takes its config via
-   env-file override (`FRANK_SMALL_ENV_FILE`, `FRANK_PRIMARY_AR_ENV_FILE`)
+   env-file override (`FRANK_SECONDARY_ENV_FILE`, `FRANK_PRIMARY_AR_ENV_FILE`)
    pointing at a staged copy; the checkout is never mutated.
 3. **Fast-fail the health wait**: poll `podman ps | grep -qx <name>` inside
    the loop — a refused boot dies in one poll instead of 20 min. Capture the