fix: remove paths filter from validate-registry workflow to run on all PRs (#28)

The validate-and-update check is required by repository ruleset but was
only running when registry files changed. This caused PRs that don't
touch registry files to be blocked indefinitely.

Now the workflow runs on all PRs to satisfy the required status check.

.github/workflows/validate-registry.yml

@@ -5,11 +5,8 @@ on:
     branches:
       - main
       - dev
-    paths:
-      - '.opencode/**'
-      - 'registry.json'
-      - 'scripts/validate-registry.sh'
-      - 'scripts/auto-detect-components.sh'
+    # Removed paths filter - this check is required by repository ruleset
+    # so it must run on ALL PRs to prevent blocking merges
   workflow_dispatch:
 
 permissions: