ci: update go-server-coverage.json [skip ci]

## Why

The Azure staging VM (`meshcore-vm`) is offline. Self-hosted runners are
unavailable, blocking all CI.

## What changed (per job)

| Job | Change | Revert |
|-----|--------|--------|
| `e2e-test` | `runs-on: [self-hosted, Linux]` → `ubuntu-latest`;
removed self-hosted-specific "Free disk space" step | Change `runs-on`
back to `[self-hosted, Linux]`, restore disk cleanup step |
| `build-and-publish` | `runs-on: [self-hosted, meshcore-runner-2]` →
`ubuntu-latest`; removed "Free disk space" prune step (noop on fresh
GH-hosted runners) | Change `runs-on` back, restore prune step |
| `deploy` | `if: false # disabled` (was `github.event_name == 'push'`);
`runs-on` kept as-is | Change `if:` back to `github.event_name ==
'push'` |
| `publish` | `runs-on: [self-hosted, Linux]` → `ubuntu-latest`; `needs:
[deploy]` → `needs: [build-and-publish]` | Change both back |

## Notes

- `go-test` and `release-artifacts` were already on `ubuntu-latest` —
untouched.
- The `deploy` job is disabled via `if: false` for trivial one-line
revert when the VM returns.
- No new `setup-*` actions were needed — `setup-node`, `setup-go`,
`docker/setup-buildx-action`, and `docker/login-action` were already
present.

Co-authored-by: you <you@example.com>

.badges/e2e-tests.json

@@ -1 +1 @@
-{"schemaVersion":1,"label":"e2e tests","message":"45 passed","color":"brightgreen"}
+{"schemaVersion":1,"label":"e2e tests","message":"82 passed","color":"brightgreen"}

.badges/frontend-coverage.json

@@ -1 +1 @@
-{"schemaVersion":1,"label":"frontend coverage","message":"39.68%","color":"red"}
+{"schemaVersion":1,"label":"frontend coverage","message":"37.26%","color":"red"}

.github/workflows/deploy.yml

@@ -135,7 +135,7 @@ jobs:
   e2e-test:
     name: "🎭 Playwright E2E Tests"
     needs: [go-test]
-    runs-on: [self-hosted, Linux]
+    runs-on: ubuntu-latest
     defaults:
       run:
         shell: bash
@@ -145,13 +145,6 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Free disk space
-        run: |
-          # Prune old runner diagnostic logs (can accumulate 50MB+)
-          find ~/actions-runner/_diag/ -name '*.log' -mtime +3 -delete 2>/dev/null || true
-          # Show available disk space
-          df -h / | tail -1
-
       - name: Set up Node.js 22
         uses: actions/setup-node@v5
         with:
@@ -252,17 +245,11 @@ jobs:
   build-and-publish:
     name: "🏗️ Build & Publish Docker Image"
     needs: [e2e-test]
-    runs-on: [self-hosted, meshcore-runner-2]
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout code
         uses: actions/checkout@v5
 
-      - name: Free disk space
-        run: |
-          docker system prune -af 2>/dev/null || true
-          docker builder prune -af 2>/dev/null || true
-          df -h /
-
       - name: Compute build metadata
         id: meta
         run: |
@@ -372,7 +359,7 @@ jobs:
   # ───────────────────────────────────────────────────────────────
   deploy:
     name: "🚀 Deploy Staging"
-    if: github.event_name == 'push'
+    if: false  # disabled: staging VM offline, manual deploy required
     needs: [build-and-publish]
     runs-on: [self-hosted, meshcore-runner-2]
     steps:
@@ -461,8 +448,8 @@ jobs:
   publish:
     name: "📝 Publish Badges & Summary"
     if: github.event_name == 'push'
-    needs: [deploy]
-    runs-on: [self-hosted, Linux]
+    needs: [build-and-publish]
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout code
         uses: actions/checkout@v5