Add GitHub workflows, release scripts, PR template

Add CI/CD and release automation assets: new GitHub Actions workflows (backend-foundation, hotfix-branch-creation, mobile-ci, product-release, web-quality), shell scripts for version/tag/release-note extraction and release-summary generation (.github/scripts/*), and a Pull Request template. Implements hotfix branch creation from tags, automatic tag name generation, version extraction from pubspec.yaml, CHANGELOG-based release notes extraction, selective mobile CI (detects changed files, builds and lints only affected Dart files), backend service test dry-runs, and automated GitHub release creation with summaries.

.github/scripts/extract-release-notes.sh

@@ -0,0 +1,65 @@
+#!/bin/bash
+# Extract release notes from CHANGELOG for a specific version
+# Usage: ./extract-release-notes.sh <app> <version> <environment> <tag_name> <output_file>
+
+set -e
+
+APP=$1
+VERSION=$2
+ENV=$3
+TAG_NAME=$4
+OUTPUT_FILE=$5
+
+if [ -z "$APP" ] || [ -z "$VERSION" ] || [ -z "$ENV" ] || [ -z "$TAG_NAME" ] || [ -z "$OUTPUT_FILE" ]; then
+  echo "❌ Error: Missing required parameters"
+  echo "Usage: ./extract-release-notes.sh <app> <version> <environment> <tag_name> <output_file>"
+  exit 1
+fi
+
+# Determine CHANGELOG path and app name
+if [ "$APP" = "worker-mobile-app" ]; then
+  CHANGELOG_PATH="apps/mobile/apps/staff/CHANGELOG.md"
+  APP_NAME="Staff Product (Worker)"
+else
+  CHANGELOG_PATH="apps/mobile/apps/client/CHANGELOG.md"
+  APP_NAME="Client Product"
+fi
+
+# Try to extract release notes for this version
+if [ -f "$CHANGELOG_PATH" ]; then
+  echo "📝 Found CHANGELOG at $CHANGELOG_PATH"
+  
+  # Extract section for this version
+  # Look for ## [VERSION] and collect until next ## [ or end of file
+  NOTES=$(awk "/## \[${VERSION}\]/,/^## \[/" "$CHANGELOG_PATH" | sed '1d;$d' | sed '/^$/d')
+  
+  if [ -z "$NOTES" ]; then
+    echo "⚠️ Warning: No CHANGELOG entry found for version $VERSION"
+    NOTES="Release $VERSION for $APP_NAME
+
+⚠️ No CHANGELOG entry found for this version. Please update the CHANGELOG manually.
+
+**Environment:** $ENV
+**Tag:** $TAG_NAME"
+  else
+    echo "✅ Extracted release notes for version $VERSION"
+    NOTES="# $APP_NAME - Release $VERSION
+
+$NOTES
+
+---
+
+**Environment:** $ENV
+**Tag:** $TAG_NAME"
+  fi
+else
+  echo "⚠️ Warning: CHANGELOG not found at $CHANGELOG_PATH"
+  NOTES="Release $VERSION for $APP_NAME
+
+**Environment:** $ENV
+**Tag:** $TAG_NAME"
+fi
+
+# Save to output file
+echo "$NOTES" > "$OUTPUT_FILE"
+echo "✅ Release notes saved to $OUTPUT_FILE"