Add Sigvild Gallery wedding photo application with automated deployment and improve Caddy plugin management

roles/sigvild-gallery/templates/api.caddy.j2

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+{{ sigvild_gallery_api_domain }} {
+    reverse_proxy {{ sigvild_gallery_host }}:{{ sigvild_gallery_port }} {
+        header_up Host {upstream_hostport}
+        header_up X-Real-IP {remote_host}
+        header_up X-Forwarded-Proto https
+        
+        # Health check
+        health_uri /api/health
+        health_timeout 5s
+        health_interval 30s
+    }
+
+    # CORS headers for frontend domain
+    @cors {
+        header Origin https://{{ sigvild_gallery_frontend_domain }}
+    }
+    header @cors {
+        Access-Control-Allow-Origin "https://{{ sigvild_gallery_frontend_domain }}"
+        Access-Control-Allow-Methods "GET, POST, PUT, DELETE, PATCH, OPTIONS"
+        Access-Control-Allow-Headers "Content-Type, Authorization, X-Requested-With"
+        Access-Control-Allow-Credentials true
+        Access-Control-Max-Age 86400
+    }
+
+    # Handle preflight requests
+    @preflight {
+        method OPTIONS
+    }
+    respond @preflight 204
+
+    # Security headers for API
+    header {
+        X-Frame-Options DENY
+        X-Content-Type-Options nosniff
+        X-XSS-Protection "1; mode=block"
+        Referrer-Policy strict-origin-when-cross-origin
+    }
+
+    # API logging
+    log {
+        output file /var/log/caddy/sigvild-api.log
+        level INFO
+        format json
+    }
+}