docs: update for Go rewrite reality — OIKOS.md build status, deprecation notices

- .agents/OIKOS.md: rewrote entire Build Status section from Python 30-day
  roadmap to Go Phases 1-6 status. Added Python-era backlog preservation.
- knowledge/wiki/containers/105-apps.md: added DEPRECATED notices for
  homelab-mcp and secrets-issuance services, pointing to Go equivalents
  and cutover checklist.
- knowledge/wiki/infrastructure/auto-deploy.md: marked webhook ids 10+11
  as deprecated, replaced Go Docker stack.
- knowledge/wiki/infrastructure/index.md: noted topology gen as Python
  with Go DB-native replacement planned.
- .agents/operations/hermes-agent.md: updated MCP references from
  FastMCP SSE Python to Streamable HTTP Go SDK.
- .agents/shared/writing-style.md: updated MCP reference, topology note.
- .agents/domains/knowledge/schema.md: updated MCP server reference.

knowledge/wiki/containers/105-apps.md

@@ -45,7 +45,16 @@ Receiver at `/opt/artifacto-deploy/` (outside the app repo): `deploy.sh` + `webh
 ### Portainer
 Native OAuth2 (Settings → Authentication → OAuth → Custom). Manual endpoints (no OIDC discovery). Uses `portainer-uid` custom-claim scope from Authentik. Container is **not** compose-managed — safe to `docker run` recreate; data lives in named volume `portainer_data`. CLI flag: `--trusted-origins docker.hubris.network` (hostname only — `IsTrustedOrigin` rejects strings containing `://`).
 
-### homelab-mcp (`/opt/homelab-mcp/`)
+### homelab-mcp (`/opt/homelab-mcp/`) — DEPRECATED (Go rewrite, Phase 6)
+
+> **Status:** This Python MCP server is being replaced by the Go `oikos api` binary
+> running in Docker on mac-mini. Cutover pending — see
+> [scripts/cutover-checklist.md](../../scripts/cutover-checklist.md) for the
+> execution plan. The Go MCP uses the official MCP Go SDK (Streamable HTTP, not
+> FastMCP) with 15 tools including `get_blast_radius`, `request_execution`, and
+> `get_agent_activity`. Source: `internal/mcp/server.go`.
+
+**Current (Python) implementation — DO NOT MODIFY, awaiting cutover:**
 FastMCP server (Python venv at `/opt/homelab-mcp/.venv`). Reads from
 `/opt/homelab-context/` (this LXC is itself an enrolled
 [homelab-context](../infrastructure/homelab-context.md) client). Source
@@ -70,7 +79,10 @@ the server code). Listens on `0.0.0.0:9811`, secret in
 `dtoro/Homelab-Docs`. Deploy script reinstalls the service unit and
 restarts on push.
 
-### secrets-issuance (`/opt/secrets-issuance/`)
+### secrets-issuance (`/opt/secrets-issuance/`) — DEPRECATED (Go Phase 5)
+
+> **Status:** Replaced by `internal/secrets/` in the Go rewrite. Machine identities
+> are now managed via Infisical (`docker compose --profile infisical up`).
 Tiny HTTP service that issues per-client age keypairs the first time
 each client calls `/issue`. Idempotent: subsequent calls return the
 same key. Mesh+LAN source-IP gated via the `MESH_SUBNETS` env in