docs: reshape runbooks into .agents/skills/<name>/SKILL.md (phase 4)

Problem: runbooks are agent-executable procedures but lived at the repo root,
separate from the other agent instruction now under .agents/.

Change:
- Move runbooks/<name>.md -> .agents/skills/<name>/SKILL.md (folder per skill,
  matching the wiki-hq skills layout). Frontmatter (name, risk_class, inputs,
  verification, docs_update_checklist, transition) preserved.
- Rewrite links (inbound from plans; between-skill siblings) via the move map.
- Update prose references in AGENTS.md, HERMES.md, .agents/OIKOS.md, and the
  operations schema; fix a pre-existing stale link to operations/commands.md.

No code consumed runbooks/ by path, so nothing else changes.

Verification: all SKILL.md frontmatter parses with valid risk_class; every
lifecycle transition resolves to an oikos/ontology.yaml state; broken-link
count 127 -> 126 (fixed one, introduced none).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.agents/skills/lifecycle-provision-node/SKILL.md

@@ -0,0 +1,33 @@
+---
+name: lifecycle-provision-node
+risk_class: config_mutation
+inputs: [node_name, kind, storage_pool]
+verification: "grep 'state: provisioning' hosts/<name>.yaml"
+docs_update_checklist: [doc_page_stub]
+transition: "planned -> provisioning"
+---
+
+# Lifecycle: provision a node
+
+Per [oikos/ontology.yaml](../../../oikos/ontology.yaml) `lifecycle.transitions`.
+Policy note: `provisioning` nodes get a lifecycle override —
+`config_mutation` actions downgrade to `reversible_low` because nothing
+depends on the node yet (see `oikos/policy.yaml` `lifecycle_overrides`).
+
+Requires (from ontology): inventory entry, IP reserved, storage pool
+chosen, doc page stub.
+
+1. Create the LXC/VM on its target Proxmox host (`pct create` /
+   `qm create`), choosing the storage pool deliberately — record it as
+   the `storage:` field once populated (Week 1 schema; not yet backfilled
+   for existing nodes).
+2. Add the inventory entry: `homelab client add <name>` for anything that
+   will run the `homelab` CLI, or a direct `hosts.<name>:` block with
+   `state: provisioning`, `kind`, `host`, `pve_id`, `lan_ip` for
+   infra-only LXCs that won't self-enroll.
+3. Stub the doc page (`containers/<pve_id>-<name>.md` or
+   `vms/<pve_id>-<name>.md`) — even a one-line "provisioning, see plan X"
+   is enough to satisfy the transition requirement.
+4. Reserve the IP in DNS/DHCP notes if it's a fixed LAN address.
+
+Next: [lifecycle-activate-node.md](../lifecycle-activate-node/SKILL.md).