⬆️(backend) upgrade pycrdt to version 0.12.47

This version has a wheel for musl linux platform, it should speed up the
build of the docker images

Author: lunika

src/backend/pyproject.toml

@@ -55,7 +55,7 @@ dependencies = [
     "nested-multipart-parser==1.6.0",
     "openai==2.21.0",
     "psycopg[binary]==3.3.2",
-    "pycrdt==0.12.44",
+    "pycrdt==0.12.47",
     "pydantic==2.12.5",
     "pydantic-ai-slim[openai,logfire,web]==1.58.0",
     "PyJWT==2.10.1",