fix: update stale docs URLs across non-TS files (#25750)

Closes [DOCS-256](https://linear.app/coder/issue/DOCS-256). Sibling to
[DOCS-253](https://linear.app/coder/issue/DOCS-253) (#25740).

Updates docs URL references across the non-TypeScript surface of
`coder/coder` to match the current docs site structure. Source-of-truth
for redirects is `coder/coder.com/redirects.json` (parent ticket
[DOCS-209](https://linear.app/coder/issue/DOCS-209)).

## What changed

| Area | Files | URL mapping |
|---|---|---|
| Top-level README | `README.md` | `/docs/workspaces` ->
`/docs/user-guides/workspace-management`, `/docs/templates` ->
`/docs/admin/templates`, `/docs/ides` ->
`/docs/user-guides/workspace-access` |
| Docs source | `docs/admin/security/0001_user_apikeys_invalidation.md`
| `/docs/admin/audit-logs` -> `/docs/admin/security/audit-logs` |
| Docs source | `docs/install/cloud/azure-vm.md` |
`/docs/coder-oss/latest/install` -> `/docs/install` |
| Dogfood | `dogfood/coder/guide.md` | `/docs/ides` ->
`/docs/user-guides/workspace-access` |
| Helm | `helm/coder/values.yaml` | `/docs/admin/workspace-proxies` ->
`/docs/admin/networking/workspace-proxies` |
| Enterprise coderd | `enterprise/coderd/coderd.go` |
`/docs/admin/encryption` -> `/docs/admin/security/database-encryption`
(error message) |
| Release tooling | `scripts/release/main_internal_test.go` |
`/docs/admin/upgrade` -> `/docs/install/upgrade` (test fixture, matches
`generate_release_notes.sh`) |
| AI bridge | `aibridge/client.go` | repinned to current `main` SHA on
renamed `docs/ai-coder/ai-gateway/monitoring.md`, line range `#L47-L57`
|
| Example templates | 12 `examples/templates/*/README.md`,
`examples/parameters/*`,
`examples/parameters-dynamic-options/README.md`,
`examples/workspace-tags/README.md`, `examples/parameters/main.tf`,
`examples/examples.gen.json` (regenerated) | `/docs/workspaces` ->
`/docs/user-guides/workspace-management`, `/docs/templates/parameters`
-> `/docs/admin/templates/extending-templates/parameters`,
`/docs/templates/dev-containers` ->
`/docs/admin/integrations/devcontainers`, `/docs/dotfiles` ->
`/docs/user-guides/workspace-dotfiles`,
`/docs/about/architecture#agents` ->
`/docs/admin/infrastructure/architecture#agents` |
| Live notification templates (DB) | New migration
`000510_fix_dormancy_notification_docs_urls.up.sql` and `.down.sql` plus
the four regenerated SMTP/webhook goldens under
`coderd/notifications/testdata/rendered-templates/` |
`/docs/templates/schedule#dormancy-threshold-enterprise` ->
`/docs/admin/templates/managing-templates/schedule#dormancy-threshold`,
`/docs/templates/schedule#dormancy-auto-deletion-enterprise` ->
`/docs/admin/templates/managing-templates/schedule#dormancy-auto-deletion`
|

The migration uses `REPLACE(body_template, ...)` scoped by template id
and `LIKE '%/docs/templates/schedule%'`, so it works regardless of which
intermediate state (`000232`, `000262`, `000305`, or `000311`) is
currently in the row.

## What did not change

Historical SQL migrations `000232`, `000262`, `000305`, and `000311` are
not modified because migrations are immutable history. The 18 remaining
stale URL references in those files are superseded at runtime by
migration `000510`. This decision matches the pattern used in the A1
sister PR (#25740).

## Verification

- `go test ./coderd/database/migrations/... -count=1` (UP+DOWN)
- `go test ./coderd/notifications/ -run TestNotificationTemplates_Golden
-update -count=1` to regenerate the four `.golden` files
- `go test ./scripts/release/ -run Test_removeMainlineBlurb -count=1`
- `make pre-commit` (gen + fmt + lint + slim build) ran clean as part of
the commit hook

I also fixed a pre-existing emdash on line 35 of
`examples/templates/azure-linux/README.md` that the lint flagged once
the file entered my diff. The line was already in `main`, but `make gen`
rewrites `examples/examples.gen.json` whenever a `README.md` changes, so
the line came back as a `+` in the diff against `origin/main` and the
`lint/emdash` step refused it.

<details>
<summary>Pre-mortem</summary>

| Risk | Mitigation |
|---|---|
| Migration overwrites future template edits | Used `REPLACE` instead of
full body overwrite. `WHERE id IN (...) AND body_template LIKE
'%/docs/templates/schedule%'` further scopes the write |
| Goldens drift from migrated body | Regenerated goldens via `-update`
after the migration was in place, so the goldens reflect the
post-migration state |
| Down migration leaves stale URLs | Down migration reverses the REPLACE
so a rollback restores the prior URLs |
| Fragment loss when redirect strips fragment | Verified the destination
`schedule.md` contains `## Dormancy threshold` and `## Dormancy
auto-deletion` anchors |
| Terraform parse breakage in `examples/parameters/main.tf` | Only
comments changed; Terraform parser is unaffected |
| Test fixtures in `scripts/release` diverging from
`generate_release_notes.sh` | Updated to match the script, which already
emits `/docs/install/upgrade` |

</details>

---

Generated by Coder Agent on behalf of @nickvigilante.

coderd/database/migrations/000518_fix_dormancy_notification_docs_urls.down.sql

@@ -0,0 +1,20 @@
+-- Revert the URL replacements applied by 000510. We use the reverse
+-- REPLACE so any other downstream edits to body_template are preserved.
+
+UPDATE notification_templates
+SET
+	body_template = REPLACE(
+		REPLACE(
+			body_template,
+			'/docs/admin/templates/managing-templates/schedule#dormancy-threshold',
+			'/docs/templates/schedule#dormancy-threshold-enterprise'
+		),
+		'/docs/admin/templates/managing-templates/schedule#dormancy-auto-deletion',
+		'/docs/templates/schedule#dormancy-auto-deletion-enterprise'
+	)
+WHERE
+	id IN (
+		'0ea69165-ec14-4314-91f1-69566ac3c5a0',
+		'51ce2fdf-c9ca-4be1-8d70-628674f9bc42'
+	)
+	AND body_template LIKE '%/docs/admin/templates/managing-templates/schedule%';

coderd/database/migrations/000518_fix_dormancy_notification_docs_urls.up.sql

@@ -0,0 +1,28 @@
+-- Update stale docs URLs in the dormancy notification templates so that
+-- they point at the current documentation path and anchors:
+--   /docs/templates/schedule#dormancy-threshold-enterprise
+--     -> /docs/admin/templates/managing-templates/schedule#dormancy-threshold
+--   /docs/templates/schedule#dormancy-auto-deletion-enterprise
+--     -> /docs/admin/templates/managing-templates/schedule#dormancy-auto-deletion
+--
+-- We use REPLACE on body_template, scoped by id and LIKE so the update
+-- is robust to the various intermediate forms that prior migrations
+-- (000232, 000262, 000305, 000311) have left on disk.
+
+UPDATE notification_templates
+SET
+	body_template = REPLACE(
+		REPLACE(
+			body_template,
+			'/docs/templates/schedule#dormancy-threshold-enterprise',
+			'/docs/admin/templates/managing-templates/schedule#dormancy-threshold'
+		),
+		'/docs/templates/schedule#dormancy-auto-deletion-enterprise',
+		'/docs/admin/templates/managing-templates/schedule#dormancy-auto-deletion'
+	)
+WHERE
+	id IN (
+		'0ea69165-ec14-4314-91f1-69566ac3c5a0',
+		'51ce2fdf-c9ca-4be1-8d70-628674f9bc42'
+	)
+	AND body_template LIKE '%/docs/templates/schedule%';