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/dev/CONTRIBUTING.md

@@ -9,7 +9,7 @@ see [CONTRIBUTING.md](../../CONTRIBUTING.md) for a human-friendly version.
 ```
 cmd/oikos/main.go          Entry point. Subcommands: api, scheduler, notifier, migrate,
                              seed, export, secret, all
-cmd/hermes/main.go         Hermes MCP client gateway (standalone binary)
+cmd/nomos/main.go          Nomos MCP client gateway (standalone binary, formerly Hermes)
 internal/httpapi/           REST + MCP server. Chi router. OpenAPI-generated types from
                              internal/httpapi/gen/api.gen.go. Strict server in impl.go.
 internal/mcp/               MCP tool implementations (get_entity, search_knowledge, etc.)
@@ -31,10 +31,10 @@ api/codegen.yaml            oapi-codegen config → generates internal/httpapi/g
 migrations/                 Forward-only SQL. Format: NNN_name.up.sql. No down migrations.
 seeds/                      Bootstrap YAML. ontology.yaml, inventory.yaml, policy.yaml,
                              knowledge.yaml. Regenerated from DB via oikos export.
-compose/                    Dockerfiles. oikos/ (multi-stage), hermes/ (distroless).
+compose/                    Dockerfiles. oikos/ (multi-stage), nomos/ (distroless).
                              Caddy config at compose/caddy/Caddyfile.oikos.
 scripts/                     Deploy, rollback, watchdog, verification, cutover checklist.
-hermes/                      Hermes config.yaml, SOUL.md, skills.
+nomos/                       Nomos config.yaml, SOUL.md, skills.
 .agents/                     Agent instruction files, domains, shared conventions, skills.
 plans/                       Design documents. active/ + done/.
 docs/adr/                    Architecture decision records. Numbered, prefix-sorted.