fix: change default task bridge socket file to be in home dir

[noot]

• change the default task bridge socket file to be in the user's home directory
• previously it was in /tmp, which is cleared on restart. the container persists on reboot and it tries to recreate the dir since it no longer exists but w root perms, which is not writable by the worker running as a user
• it's now in the user prime-worker directory which is persistent

[JannikSt]

LGTM! Can you run this on a remote machine (e.g. a bigger single H100) for testing? You should be able to deploy the following task which actually generates data:

{
    "name": "Qwen3-4B:Math",
    "image": "primeintellect/prime-rl:commit-d769064",
    "env_vars": {
        "HF_HUB_CACHE": "/shared/hf_hub",
        "HF_HUB_DISABLE_PROGRESS_BARS": "0",
        "HF_HUB_ETAG_TIMEOUT": "500"
    },
    "cmd": [
		    "@configs/inference/synthetic-2/base.toml",
		    "@configs/inference/synthetic-2/qwen3-4b.toml",
		    "--data.name",
		    "PrimeIntellect/SYNTHETIC-2-Base-Math",
        "--parallel.pp.rank",
        "${GROUP_INDEX}",
        "--parallel.pp.world-size",
        "${GROUP_SIZE}",
        "--parallel.pp.iroh-seed",
        "${WORKER_P2P_SEED}",
        "--parallel.pp.iroh-peer-id",
        "${NEXT_P2P_ADDRESS}",
        "--group-id",
        "${GROUP_ID}",
        "--task-id",
        "${TASK_ID}",
        "--step-path",
        "/state/counter",
        "--log.level",
        "debug"
    ],
    "scheduling_config": {
        "plugins": {
            "node_groups": {
                "allowed_topologies": ["1x24GB", "1x40-48GB", "test-config"]
            }
        }
    },
    "storage_config": {
        "file_name_template": "Qwen/Qwen3-4B/PrimeIntellect/SYNTHETIC-2-Base-Math/1-${NODE_GROUP_ID}-${NODE_GROUP_SIZE}-${CURRENT_FILE_INDEX}-${NODE_GROUP_INDEX}.parquet"
    },
    "volume_mounts": [
        {
            "host_path": "/group-${GROUP_ID}-state",
            "container_path": "/state"
        }
    ]
}

You can also check the docker logs - it will mention that its logging data to the taskbridge after a while.