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- Historical references to the OLD frank-small (FreeToken/CUDA on the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

@@ -142,7 +142,7 @@ good_env() {
     # ~28 KiB/position (FLAGS.md). Against it: ~62 GiB resident weights,
     # the arena scratch 3.8 + 8.4*(MAX_TOK/16384) GiB, the vision tower
     # ~2 GiB pool charge, the 20 GiB host reserve and the host baseline
-    # + co-tenancy (frank-small, ComfyUI, Caddy/observability) ~15. The
+    # + co-tenancy (frank-secondary, ComfyUI, Caddy/observability) ~15. The
     # box has 121 GiB unified. The n-gram table rides as mmap'd page
     # cache beside the checkpoint and is not a pinned charge (the card's
     # own quickstart arithmetic does not bill it).
@@ -320,8 +320,8 @@ $(cat "$TEST_TMP/serve.log")"
     grep -qE 'podman pull' "$DEPLOYER"
 }
 
-@test "the stray sweep cannot take frank-small or the deployer down" {
-    # frank-small also listens on this host (7771, llama-server) and the
+@test "the stray sweep cannot take frank-secondary or the deployer down" {
+    # frank-secondary also listens on this host (7771, llama-server) and the
     # deployer's own command line contains "frank-large"; only the FULL
     # container name matches a stray manual flash-server run and nothing
     # else.