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- Historical references to the OLD frank-small (FreeToken/CUDA on the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.

tests/homepage_config.bats

@@ -72,8 +72,8 @@ by_probe = {s["probe"]: s["name"] for s in services}
 primary = by_probe.get("192.168.0.235:7770")
 assert primary == "frank-primary", f"Dankserver :7770 card is named {primary!r}"
 # Dankclaw serves two endpoints on two ports: frank-large (unsloth llama.cpp
-# on the iGPU, 7770) and frank-small (llama.cpp on the RTX 3090, 7771).
+# on the iGPU, 7770) and frank-secondary (llama.cpp on the RTX 3090, 7771).
 assert by_probe.get("127.0.0.1:7770") == "frank-large", by_probe.get("127.0.0.1:7770")
-assert by_probe.get("127.0.0.1:7771") == "frank-small", by_probe.get("127.0.0.1:7771")
+assert by_probe.get("127.0.0.1:7771") == "frank-secondary", by_probe.get("127.0.0.1:7771")
 PY
 }