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/infrastructure/index.md

@@ -56,7 +56,7 @@ are documented in their own pages. Each system below links to its full doc.
 
 - **[Topology diagram (generated)](topology.md)** — Mermaid graph of compute,
   ingress routing, and storage mounts. Auto-generated from `inventory.yaml`
-  by `oikos/gen-topology.py`.
+  by `oikos/gen-topology.py` (Python — Go DB-native replacement planned).
 
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