fix(host-metrics): exclude image and firmware filesystems (#1469)

* fix(host-metrics): exclude image and firmware filesystems

* fix(ci): build plugin SDK before dependent checks

* fix(mysql): keep plugin settings scope indexes within limits

* test(mysql): refresh reviewed plugin upgrade SQL

.github/workflows/pr-check.yml

@@ -24,6 +24,9 @@ jobs:
       - name: Install dependencies
         run: npm ci
 
+      - name: Build plugin SDK
+        run: npm run build:sdk
+
       - name: Lint
         # npm run lint, not npx eslint — the script also checks that the
         # generated dialect schemas match schema.ts, which eslint cannot see.
@@ -94,6 +97,9 @@ jobs:
       - name: Install dependencies
         run: npm ci
 
+      - name: Build plugin SDK
+        run: npm run build:sdk
+
       # Each run applies the migrations to an empty database first, so a
       # migration that does not apply cleanly fails the build.
       - name: Verify Postgres