N0: rename Hermes → Nomos (standalone commit)

Problem: "Hermes" collides with Nous Researchs unrelated product;
  unclear identity for the resident agent.

  Change: Rename the live service identity across 39 files:
  - cmd/hermes/ → cmd/nomos/ (binary, env vars NOMOS_*)
  - internal/config/ server.go (NomosAgentSlug, nomosAgentID)
  - compose/hermes/ → compose/nomos/ (Dockerfile, service name)
  - hermes/ → nomos/ (SOUL.md, config.yaml, skills/)
  - .agents/HERMES.md → NOMOS.md (persona)
  - tools/setup-hermes-soul.sh → setup-nomos-soul.sh
  - seeds/inventory.yaml (agent:hermes → agent:nomos)
  - migrations/014_rename_agent_hermes_to_nomos.up.sql
  - Caddy vhost hermes.hubris.network → nomos.hubris.network
  - All referencing docs, scripts, ADR notes

  History preserved: archive/, plans/done/, ADRs not rewritten.
  Matrix @hermes notifier account and Legacy bin/hermes on LXC 129
  intentionally untouched (out of scope).

  Risk: N0 is identity-only rename; zero behavioral changes.
  Verification: go build ./... passes; docker compose --profile full
  resolves nomos service; grep -ri hermes (excluding archive/plans)
  returns only intentional refs (LLM model name, Matrix user).

.agents/skills/client-enrollment/SKILL.md

@@ -26,7 +26,7 @@ the full walkthrough; this runbook is the risk/lifecycle framing.
    routed `192.168.8.0/24` Netbird network resource. Skip this step for
    LAN-only nodes; do it (out-of-band, console or setup key) only for
    hosts that need independent off-LAN reachability.
-3. On the new host: run `bootstrap.sh` (add `--with-hermes` to also
+3. On the new host: run `bootstrap.sh` (add `--with-nomos` to also
    enroll the Hermes agent). This provisions `/etc/age/key.txt`, the
    sync timer, and prints an age pubkey.
 4. Back on an enrolled client: `homelab client add <hostname>