Try to fix Duckdb extensions
Error when computing split-duckdb-index
```
   "details": {
                    "error": "IO Error: Extension \"//.duckdb/extensions/v0.8.1/linux_amd64_gcc4/httpfs.duckdb_extension\" not found.\nExtension \"httpfs\" is an existing extension.\n\nInstall it first using \"INSTALL httpfs\".",
                    "cause_exception": "IOException",
                    "cause_message": "IO Error: Extension \"//.duckdb/extensions/v0.8.1/linux_amd64_gcc4/httpfs.duckdb_extension\" not found.\nExtension \"httpfs\" is an existing extension.\n\nInstall it first using \"INSTALL httpfs\".",
                    "cause_traceback": [
                        "Traceback (most recent call last):\n",
                        "  File \"/src/services/worker/src/worker/job_manager.py\", line 160, in process\n    job_result = self.job_runner.compute()\n",
                        "  File \"/src/services/worker/src/worker/job_runners/split/duckdb_index.py\", line 256, in compute\n    compute_index_rows(\n",
                        "  File \"/src/services/worker/src/worker/job_runners/split/duckdb_index.py\", line 148, in compute_index_rows\n    con.sql(create_command_sql)\n",
                        "duckdb.IOException: IO Error: Extension \"//.duckdb/extensions/v0.8.1/linux_amd64_gcc4/httpfs.duckdb_extension\" not found.\nExtension \"httpfs\" is an existing extension.\n\nInstall it first using \"INSTALL httpfs\".\n"
                    ]
                },
```
Try to fix Duckdb extensions: Error when computing split-duckdb-index
```
   "details": {
                    "error": "IO Error: Extension \"//.duckdb/extensions/v0.8.1/linux_amd64_gcc4/httpfs.duckdb_extension\" not found.\nExtension \"httpfs\" is an existing extension.\n\nInstall it first using \"INSTALL httpfs\".",
                    "cause_exception": "IOException",
                    "cause_message": "IO Error: Extension \"//.duckdb/extensions/v0.8.1/linux_amd64_gcc4/httpfs.duckdb_extension\" not found.\nExtension \"httpfs\" is an existing extension.\n\nInstall it first using \"INSTALL httpfs\".",
                    "cause_traceback": [
                        "Traceback (most recent call last):\n",
                        "  File \"/src/services/worker/src/worker/job_manager.py\", line 160, in process\n    job_result = self.job_runner.compute()\n",
                        "  File \"/src/services/worker/src/worker/job_runners/split/duckdb_index.py\", line 256, in compute\n    compute_index_rows(\n",
                        "  File \"/src/services/worker/src/worker/job_runners/split/duckdb_index.py\", line 148, in compute_index_rows\n    con.sql(create_command_sql)\n",
                        "duckdb.IOException: IO Error: Extension \"//.duckdb/extensions/v0.8.1/linux_amd64_gcc4/httpfs.duckdb_extension\" not found.\nExtension \"httpfs\" is an existing extension.\n\nInstall it first using \"INSTALL httpfs\".\n"
                    ]
                },
```