Downgrade @fastify/websocket to v8 (Fastify 4 compatible)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/package-lock.json

@@ -13,7 +13,7 @@
         "@fastify/helmet": "^11.1.1",
         "@fastify/jwt": "^8.0.1",
         "@fastify/rate-limit": "^9.1.0",
-        "@fastify/websocket": "^11.2.0",
+        "@fastify/websocket": "^8.3.1",
         "bcryptjs": "^2.4.3",
         "fastify": "^4.28.1",
         "ioredis": "^5.3.2",
@@ -562,42 +562,15 @@
       }
     },
     "node_modules/@fastify/websocket": {
-      "version": "11.2.0",
+      "version": "8.3.1",
-      "resolved": "https://registry.npmjs.org/@fastify/websocket/-/websocket-11.2.0.tgz",
+      "resolved": "https://registry.npmjs.org/@fastify/websocket/-/websocket-8.3.1.tgz",
-      "integrity": "sha512-3HrDPbAG1CzUCqnslgJxppvzaAZffieOVbLp1DAy1huCSynUWPifSvfdEDUR8HlJLp3sp1A36uOM2tJogADS8w==",
+      "integrity": "sha512-hsQYHHJme/kvP3ZS4v/WMUznPBVeeQHHwAoMy1LiN6m/HuPfbdXq1MBJ4Nt8qX1YI+eVbog4MnOsU7MTozkwYA==",
-      "funding": [
-        {
-          "type": "github",
-          "url": "https://github.com/sponsors/fastify"
-        },
-        {
-          "type": "opencollective",
-          "url": "https://opencollective.com/fastify"
-        }
-      ],
       "license": "MIT",
       "dependencies": {
-        "duplexify": "^4.1.3",
+        "fastify-plugin": "^4.0.0",
-        "fastify-plugin": "^5.0.0",
+        "ws": "^8.0.0"
-        "ws": "^8.16.0"
       }
     },
-    "node_modules/@fastify/websocket/node_modules/fastify-plugin": {
-      "version": "5.1.0",
-      "resolved": "https://registry.npmjs.org/fastify-plugin/-/fastify-plugin-5.1.0.tgz",
-      "integrity": "sha512-FAIDA8eovSt5qcDgcBvDuX/v0Cjz0ohGhENZ/wpc3y+oZCY2afZ9Baqql3g/lC+OHRnciQol4ww7tuthOb9idw==",
-      "funding": [
-        {
-          "type": "github",
-          "url": "https://github.com/sponsors/fastify"
-        },
-        {
-          "type": "opencollective",
-          "url": "https://opencollective.com/fastify"
-        }
-      ],
-      "license": "MIT"
-    },
     "node_modules/@ioredis/commands": {
       "version": "1.5.1",
       "resolved": "https://registry.npmjs.org/@ioredis/commands/-/commands-1.5.1.tgz",
@@ -819,18 +792,6 @@
         "node": ">=0.10"
       }
     },
-    "node_modules/duplexify": {
-      "version": "4.1.3",
-      "resolved": "https://registry.npmjs.org/duplexify/-/duplexify-4.1.3.tgz",
-      "integrity": "sha512-M3BmBhwJRZsSx38lZyhE53Csddgzl5R7xGJNk7CVddZD6CcmwMCH8J+7AprIrQKH7TonKxaCjcv27Qmf+sQ+oA==",
-      "license": "MIT",
-      "dependencies": {
-        "end-of-stream": "^1.4.1",
-        "inherits": "^2.0.3",
-        "readable-stream": "^3.1.1",
-        "stream-shift": "^1.0.2"
-      }
-    },
     "node_modules/ecdsa-sig-formatter": {
       "version": "1.0.11",
       "resolved": "https://registry.npmjs.org/ecdsa-sig-formatter/-/ecdsa-sig-formatter-1.0.11.tgz",
@@ -840,15 +801,6 @@
         "safe-buffer": "^5.0.1"
       }
     },
-    "node_modules/end-of-stream": {
-      "version": "1.4.5",
-      "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.5.tgz",
-      "integrity": "sha512-ooEGc6HP26xXq/N+GCGOT0JKCLDGrq2bQUZrQ7gyrJiZANJ/8YDTxTpQBXGMn+WbIQXNVpyWymm7KYVICQnyOg==",
-      "license": "MIT",
-      "dependencies": {
-        "once": "^1.4.0"
-      }
-    },
     "node_modules/esbuild": {
       "version": "0.27.4",
       "resolved": "https://registry.npmjs.org/esbuild/-/esbuild-0.27.4.tgz",
@@ -1234,15 +1186,6 @@
         "node": ">=14.0.0"
       }
     },
-    "node_modules/once": {
-      "version": "1.4.0",
-      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
-      "integrity": "sha512-lNaJgI+2Q5URQBkccEKHTQOPaXdUxnZZElQTZY0MFUAuaEqe1E+Nyvgdz/aIyNi6Z9MzO5dv1H8n58/GELp3+w==",
-      "license": "ISC",
-      "dependencies": {
-        "wrappy": "1"
-      }
-    },
     "node_modules/pg": {
       "version": "8.20.0",
       "resolved": "https://registry.npmjs.org/pg/-/pg-8.20.0.tgz",
@@ -1449,20 +1392,6 @@
       "integrity": "sha512-tYC1Q1hgyRuHgloV/YXs2w15unPVh8qfu/qCTfhTYamaw7fyhumKa2yGpdSo87vY32rIclj+4fWYQXUMs9EHvg==",
       "license": "MIT"
     },
-    "node_modules/readable-stream": {
-      "version": "3.6.2",
-      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.2.tgz",
-      "integrity": "sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==",
-      "license": "MIT",
-      "dependencies": {
-        "inherits": "^2.0.3",
-        "string_decoder": "^1.1.1",
-        "util-deprecate": "^1.0.1"
-      },
-      "engines": {
-        "node": ">= 6"
-      }
-    },
     "node_modules/real-require": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/real-require/-/real-require-0.2.0.tgz",
@@ -1642,21 +1571,6 @@
         "reusify": "^1.0.0"
       }
     },
-    "node_modules/stream-shift": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/stream-shift/-/stream-shift-1.0.3.tgz",
-      "integrity": "sha512-76ORR0DO1o1hlKwTbi/DM3EXWGf3ZJYO8cXX5RJwnul2DEg2oyoZyjLNoQM8WsvZiFKCRfC1O0J7iCvie3RZmQ==",
-      "license": "MIT"
-    },
-    "node_modules/string_decoder": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
-      "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
-      "license": "MIT",
-      "dependencies": {
-        "safe-buffer": "~5.2.0"
-      }
-    },
     "node_modules/thread-stream": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/thread-stream/-/thread-stream-3.1.0.tgz",
@@ -1716,18 +1630,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/util-deprecate": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
-      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
-      "license": "MIT"
-    },
-    "node_modules/wrappy": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
-      "license": "ISC"
-    },
     "node_modules/ws": {
       "version": "8.19.0",
       "resolved": "https://registry.npmjs.org/ws/-/ws-8.19.0.tgz",

backend/package.json

@@ -14,7 +14,7 @@
     "@fastify/helmet": "^11.1.1",
     "@fastify/jwt": "^8.0.1",
     "@fastify/rate-limit": "^9.1.0",
-    "@fastify/websocket": "^11.2.0",
+    "@fastify/websocket": "^8.3.1",
     "bcryptjs": "^2.4.3",
     "fastify": "^4.28.1",
     "ioredis": "^5.3.2",