refactor(pr_compliance|main): switch to workflow_calls for PR Compliance gating

- Changed `pr-compliance.yml` trigger to `workflow_call` for improved modularity.
- Updated `main.yml` to trigger PR workflows on `pull_request` and added dependency on PR Compliance.
- Simplified workflow structure for better clarity and maintainability.

Author: allnes

.github/workflows/main.yml

@@ -4,9 +4,8 @@ on:
   push:
     branches:
       - master
-  workflow_run:
-    workflows: ["PR Compliance"]
-    types: [completed]
+  pull_request:
+    types: [opened, edited, synchronize, reopened]
   merge_group:
   schedule:
     - cron: '0 0 * * *'
@@ -20,8 +19,11 @@ concurrency:
         !startsWith(github.ref, 'refs/heads/gh-readonly-queue') }}
 
 jobs:
+  pr_compliance:
+    uses: ./.github/workflows/pr-compliance.yml
+
   pre-commit:
-    if: ${{ github.event_name != 'workflow_run' || github.event.workflow_run.conclusion == 'success' }}
+    needs: [pr_compliance]
     uses: ./.github/workflows/pre-commit.yml
   ubuntu:
     needs:

.github/workflows/pr-compliance.yml

@@ -1,8 +1,7 @@
 name: PR Compliance
 
 on:
-  pull_request:
-    types: [opened, edited, synchronize, reopened]
+  workflow_call:
 
 jobs:
   unit_tests: