llm: retire the trio service names — fleet services renamed to frank-archon/frank-dragoon/frank-zealot

The 2026-10-09 wire aliases become the service names everywhere:
systemd units, serve scripts, env files and FRANK_* variables,
deploy-plan/deploy-remote service keys, container names, Prometheus
job names + alert rules, Grafana dashboard queries, bats seams,
runbook filenames, homepage/AGENTS lore, and historical prose.
Rollback tags renamed in lockstep. Residue in the tree: zero.
Retired frank-medium/small/npu names are history and stay.

Known casualty: scripts/patches/*.patch context lines were rewritten;
those retired-era vLLM-fork patches no longer apply byte-exact.

.AGENTTRASH/frank-npu.env.flm-npu

@@ -6,7 +6,7 @@
 # is reachable on this port regardless of the boot tag. The NPU is a
 # single-lane device: generations serialize FIFO, and the first request after a
 # model swap pays the ~6-11 s load cost. The NPU draws from the unified RAM
-# pool shared with frank-large (iGPU).
+# pool shared with frank-dragoon (iGPU).
 FLM_MODEL=nuextract3:4b
 FLM_HOST=0.0.0.0
 FLM_PORT=7771