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).

internal/config/config.go

@@ -20,7 +20,7 @@ type Config struct {
 
 	// Auth (Phase 2: static bearer tokens + OIDC JWT)
 	APIToken       string // operator/CI bearer token for the REST API
-	MCPBearerToken string // shared secret for Hermes→API MCP calls
+	MCPBearerToken string // shared secret for Nomos→API MCP calls
 	OIDCIssuer     string // OIDC issuer URL for JWT validation (e.g. https://authentik.example.com/application/o/oikos/)
 	OIDCClientID   string // OIDC client ID (aud claim expected in JWT)
 
@@ -54,9 +54,9 @@ type Config struct {
 	// Approval HMAC secret (Phase 3)
 	ApprovalHMACSecret string
 
-	// Hermes agent entity ID (Phase 4)
-	HermesAgentID   string
-	HermesAgentSlug string
+	// Nomos agent entity ID (Phase 4)
+	NomosAgentID   string
+	NomosAgentSlug string
 
 	// Infisical (Phase 5)
 	InfisicalSiteURL      string
@@ -151,11 +151,11 @@ func FromEnv() Config {
 	if v := os.Getenv("OIKOS_APPROVAL_HMAC_SECRET"); v != "" {
 		c.ApprovalHMACSecret = v
 	}
-	if v := os.Getenv("OIKOS_HERMES_AGENT_ID"); v != "" {
-		c.HermesAgentID = v
+	if v := os.Getenv("OIKOS_NOMOS_AGENT_ID"); v != "" {
+		c.NomosAgentID = v
 	}
-	if v := os.Getenv("OIKOS_HERMES_AGENT_SLUG"); v != "" {
-		c.HermesAgentSlug = v
+	if v := os.Getenv("OIKOS_NOMOS_AGENT_SLUG"); v != "" {
+		c.NomosAgentSlug = v
 	}
 
 	// Phase 5: Infisical secrets