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.

.agents/domains/knowledge/schema.md

@@ -17,7 +17,7 @@ fixed paths, so the wiki reorganization never moves it.
 | Layer | Location | Consumed by |
 |-------|----------|-------------|
 | Substrate — source of truth | `inventory.yaml` (root) | MCP server, `homelab` CLI, `oikos/` scheduler/drift/relations/gen-topology |
-| Substrate — generated host records | `hosts/*.yaml` (root) | `mcp/server.py` (`HOSTS_DIR`), `bin/homelab`; written by `mcp/build_host_files.py` |
+| Substrate — generated host records | `hosts/*.yaml` (root) | Go `internal/mcp/` server, `bin/homelab`; written by `mcp/build_host_files.py` |
 | Substrate — kernel + context cards | `oikos/` (code, `oikos/cards/`, `oikos/state.json`) | MCP `explain`, scheduler |
 | Narrative — synthesized wiki | `knowledge/wiki/{hosts,containers,vms,infrastructure}/` | humans, agents via MCP `get_page` / `search_docs` |
 | Evidence — immutable sources | `knowledge/sources/` (references + investigations) | synthesis into wiki pages |