fix(ci): wire required checks for the merge queue

.github/workflows/ci.yml

@@ -10,6 +10,7 @@
 name: CI
 
 on:
+  merge_group:
   push:
     branches: [main, master, develop]
   pull_request:

.github/workflows/pr-validation.yml

@@ -8,6 +8,7 @@
 name: PR Validation
 
 on:
+  merge_group:
   pull_request:
     types: [opened, synchronize, reopened]
     branches:

.github/workflows/reuse.yml

@@ -6,6 +6,7 @@
 name: REUSE Compliance
 
 on:
+  merge_group:
   # No paths filter: "Check REUSE Compliance" is a REQUIRED status check, so it
   # must report on every PR. A paths filter would skip the workflow on changes
   # that do not match (e.g. root-only files like renovate.json, since "**/*"

.github/workflows/security-analysis.yml

@@ -10,6 +10,7 @@
 name: Security Analysis
 
 "on":
+  merge_group:
   push:
     branches: [main, master]
   pull_request: