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-version.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+# Extract version from version file for products
+# Usage: ./extract-version.sh <app>
+# app: worker-mobile-app or client-mobile-app
+
+set -e
+
+APP=$1
+
+if [ -z "$APP" ]; then
+  echo "❌ Error: App parameter required (worker-mobile-app or client-mobile-app)"
+  exit 1
+fi
+
+# Determine pubspec path
+if [ "$APP" = "worker-mobile-app" ]; then
+  PUBSPEC_PATH="apps/mobile/apps/staff/pubspec.yaml"
+  APP_NAME="Staff Product (Worker)"
+else
+  PUBSPEC_PATH="apps/mobile/apps/client/pubspec.yaml"
+  APP_NAME="Client Product"
+fi
+
+# Check if pubspec exists
+if [ ! -f "$PUBSPEC_PATH" ]; then
+  echo "❌ Error: pubspec.yaml not found at $PUBSPEC_PATH"
+  exit 1
+fi
+
+# Extract version (format: X.Y.Z+buildNumber)
+VERSION_LINE=$(grep "^version:" "$PUBSPEC_PATH")
+if [ -z "$VERSION_LINE" ]; then
+  echo "❌ Error: Could not find version in $PUBSPEC_PATH"
+  exit 1
+fi
+
+# Extract just the semantic version (before the +)
+VERSION=$(echo "$VERSION_LINE" | sed 's/version: *//' | sed 's/+.*//' | tr -d ' ')
+
+# Validate version format
+if ! [[ "$VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+  echo "❌ Error: Invalid version format in pubspec.yaml: $VERSION"
+  echo "Expected format: X.Y.Z (e.g., 0.1.0)"
+  exit 1
+fi
+
+echo "✅ Extracted version from $PUBSPEC_PATH: $VERSION"
+echo "$VERSION"