archive: remove entire archive/ directory and all references

archive/ contained the old narrative wiki (superseded by DB as source
of truth), hermes-plans, oikos-cards, ledger, secrets-issuance, and
SOPS backups — all Python-era artifacts with no ongoing value.

Updated all cross-references in:
- AGENTS.md, README.md
- .agents/operations/commands.md (point to docs/infrastructure/)
- .agents/shared/llm-wiki.md, page-templates.md
- .agents/domains/knowledge/schema.md, operations/schema.md
- .agents/skills/*/SKILL.md
- docs/infrastructure/*.md (removed archive link targets)
- docs-lint/SKILL.md known-baseline note

.agents/shared/llm-wiki.md

@@ -18,18 +18,18 @@ DB-native model.
   `seed_versions`) and mutated at runtime via the API/MCP. `oikos export` regenerates
   `seeds/{ontology,inventory,policy}.yaml` for version control.
 - **Sources** are immutable raw material: incident records (now `investigation` entities in the DB,
-  historically `archive/knowledge/sources/investigations/`), external reference docs, and the live
+  historically investigation entities in the DB), external reference docs, and the live
   system itself (`pct config`, `docker inspect`). Read them; do not rewrite them into other sources.
 - **Wiki** — the synthesized, authoritative current-state layer. Today this is the set of
   `document` entities in the DB (one per node and per cross-cutting system), queried via MCP
   `search_knowledge` / `get_entity_knowledge`. The legacy file-based wiki is frozen at
-  `archive/knowledge/{hosts,containers,vms,infrastructure}/` for historical reference only.
+  (deleted — DB is sole source of truth).
 - **Index** (`index.md` / folder `README.md`) is a pure listing — every page in scope with a
   one-line summary, and nothing else. Anything the section wants to say up front goes into a page
   the index lists, not into the index.
 - **Log** is append-only, recording *doc-maintenance operations* (restructures, source ingests,
   lint sweeps) in single-line format: `## [YYYY-MM-DD] <op> | <summary>`. The active log is the DB
-  audit trail; `archive/knowledge/log.md` is the frozen legacy equivalent.
+  audit trail; frozen legacy log was deleted with the archive.
 
 ## Two logs, kept distinct