Consolidate co-op/runbooks into co-op/ops-docs

Absorbs the Cloudron server-migration material from co-op/runbooks
(now archived) so there is a single public operator documentation
repository. Files move into migration/ (plan, DNS change sheet,
pre-migration state) and provider-pricing/ is kept as its own section;
the merged README replaces both.

History is preserved: this is a merge of the unrelated histories, so
co-op/runbooks' 26 commits remain reachable from this repository and
git log -- migration/ shows their real authors and messages. File
contents are byte-identical to co-op/runbooks (blob hashes unchanged).

README.md

@@ -2,9 +2,12 @@
 
 Operator- and maintainer-facing documentation for the Inference Cooperative.
 This is the material that describes how the co-op's infrastructure is run —
-access tokens, scheduled tasks, maintenance procedures, and outage write-ups —
-as opposed to the member-facing documentation published at
-<https://docs.inference.coop/>.
+access tokens, scheduled tasks, maintenance procedures, outage write-ups, and
+the server-migration record — as opposed to the member-facing documentation
+published at <https://docs.inference.coop/>.
+
+Anyone may read it; operators are the audience. Comment, or open an issue,
+where something looks wrong — that review is the point.
 
 ## This repository is deliberately not a website
 
@@ -24,16 +27,47 @@ Read it on the web here: <https://git.inference.coop/co-op/ops-docs>
 | `maintenance/chat-task-models.md` | The small pinned model used for chat titles/tags/suggestions |
 | `maintenance/librechat-sandbox.md` | Operating the LibreChat evaluation instance (config, overlay image, key sync, pitfalls) |
 | `incidents/` | Post-incident write-ups, one file per incident |
+| `migration/` | The Cloudron server-migration record: the plan, the DNS change sheet, and the captured pre-migration state |
+| `provider-pricing/` | What our model providers charge, and when it changed |
+
+## The migration material
+
+`migration/` holds the record of moving Cloudron to its new server: the plan
+([`cloudron-server-migration.md`](migration/cloudron-server-migration.md)),
+the record-by-record cutover sheet
+([`dns-change-sheet.md`](migration/dns-change-sheet.md)), and the captured
+pre-migration state the restore checker compares against
+([`migration-before-state.json`](migration/migration-before-state.json)).
+
+**The migration is complete (2026-11-02)** — this material is kept as the
+record of how it was planned and done, not as pending work. Current
+operational procedure lives in the co-op's `cloudron-ops` skill; the
+member-facing description lives in `co-op/docs/infrastructure.md`.
+
+### Read the DNS sheet with this in mind
+
+Its record counts **cannot be trusted until reconciled against the registrar's
+panel.** The zone is wildcarded, so *any* hostname resolves — a name that
+answers proves nothing about whether a record exists. At least two listed
+records turned out not to exist, and the real record inventory is only visible
+in the registrar's own list.
+
+## No secrets here
+
+Audited 2026-11-01, including the full commit history: no credentials, tokens,
+keys, member emails or account identifiers. Where a runbook needs a credential
+to exist (a backup passphrase, an S3 key), it records **where the credential is
+held**, never the credential.
 
 ## Where operators look
 
 - **Member-facing docs** live in [`co-op/docs`](https://git.inference.coop/co-op/docs)
   and are published at <https://docs.inference.coop/>.
-- **Migration runbooks** live in [`co-op/runbooks`](https://git.inference.coop/co-op/runbooks).
 - The member-facing docs link here from their "For operators" section.
 
 ## History
 
-These files were moved here from `co-op/docs`, where they were previously
-published on the member-facing site. The commit history for each file is
-preserved in this repository.
+The operator runbook, maintenance pages and incident write-ups were moved here
+from `co-op/docs`, where they were previously published on the member-facing
+site. The migration material came from `co-op/runbooks` (now archived), and was
+brought across with its commit history intact via an unrelated-histories merge.