Extract preview/sync GitHub Actions

[backspace]

I noticed that boxel-home PR previews are broken:

This is because the interface to _publish-realm changed:

Publishing https://realms-staging.stack.cards/boxel_homepage_realm/boxel-home-pr-57/ to https://boxel_homepage_realm.staging.boxel.dev/boxel-home-pr-57/
Failed to publish realm (HTTP 202):
{
  "data": {
    "type": "published_realm",
    "id": "23ea3f2a-9c7a-4028-ad3a-7be647ed476b",
    "attributes": {
      "sourceRealmURL": "https://realms-staging.stack.cards/boxel_homepage_realm/boxel-home-pr-57/",
      "publishedRealmURL": "https://boxel_homepage_realm.staging.boxel.dev/boxel-home-pr-57/",
      "lastPublishedAt": "1778870465062",
      "status": "pending"
    }
  }
}

HTTP 202 is actually expected now!

I also noticed that boxel-catalog, boxel-home, and boxel-skills were all using duplicative bespoke workflows to accomplish similar tasks, with use of cardstack/boxel-cli, npm Boxel CLI, and the old workspace sync CLI.

This extracts the preview/sync workflows into the monorepo so they can be used from external repositories and tested in-monorepo in case of interface changes like the above.

[github-actions]

Observability diff (vs staging)

Show diff

diff --git a/tmp/remote-canon.eE8U1F/dashboards/boxel-status/indexing.json b/tmp/committed-canon.e0D5sd/dashboards/boxel-status/indexing.json
index a39cf75..25280b9 100644
--- a/tmp/remote-canon.eE8U1F/dashboards/boxel-status/indexing.json
+++ b/tmp/committed-canon.e0D5sd/dashboards/boxel-status/indexing.json
@@ -69,6 +69,10 @@
           "uid": "cef5v5sl9k7i8f"
         },
         "description": "System-wide operator action: queue a full reindex across every realm. The button disables itself while a `full-reindex` orchestration job is already pending or running. Per-realm reindex moved to the Realms dashboard. Click POSTs with `Authorization: Bearer ${grafana_secret}` (substituted from SSM at apply time, CS-10929).",
+        "fieldConfig": {
+          "defaults": {},
+          "overrides": []
+        },
         "gridPos": {
           "h": 8,
           "w": 24,

(Run: https://github.com/cardstack/boxel/actions/runs/26132751396)

[github-actions]

Grafana preview

Preview deployed for 1 dashboard in the staging Grafana.
Cross-dashboard drill-throughs still point at the canonical staging dashboards.

• Folder: Preview – PR #4897: Boxel Status

Dashboards:

• [PR #4897] Indexing

Preview is torn down automatically when this PR is closed or merged.

(Run: https://github.com/cardstack/boxel/actions/runs/26132751428)

[github-actions]

Preview deployments

• Host staging preview

• Host production preview

Host Test Results

    1 files  ± 0      1 suites  ±0   1h 30m 24s ⏱️ - 18m 1s
2 665 tests  - 46  2 650 ✅  - 46  15 💤 ±0  0 ❌ ±0 
2 684 runs   - 46  2 669 ✅  - 46  15 💤 ±0  0 ❌ ±0 

Results for commit d7095f0. ± Comparison against earlier commit 79657eb.

Realm Server Test Results

    1 files  ± 0      1 suites  ±0   8m 34s ⏱️ +50s
1 408 tests  - 42  1 408 ✅  - 42  0 💤 ±0  0 ❌ ±0 
1 495 runs   - 46  1 495 ✅  - 46  0 💤 ±0  0 ❌ ±0 

Results for commit d7095f0. ± Comparison against earlier commit 79657eb.