InfluxDB Publisher v2: ApiException generated when invalid token is used

[BrianJKoopman]

In the InfluxDB Publisher v2 agent, if an invalid token is used, then the agent crashes with this error (sorry, txaio formatting is awful):

2026-03-26T20:42:35+0000 startup-op: launching record
2026-03-26T20:42:35+0000 start called for record
2026-03-26T20:42:35+0000 record:0 Status is now "starting".
2026-03-26T20:42:35+0000 record:0 Status is now "running".
2026-03-26T20:42:35+0000 gzip encoding enabled: False
2026-03-26T20:42:35+0000 data protocol: line
2026-03-26T20:42:35+0000 Unable to format event {'log_logger': <Logger 'ocs.ocs_agent.OCSAgent'>, 'log_level': <LogLevel=info>, 'log_namespace': 'ocs.ocs_agent.OCSAgent', 'log_source': None, 'log_format': 'record:0 CRASH: [Failure instance: Traceback: <class \'influxdb_client.rest.ApiException\'>: (401)\nReason: Unauthorized\nHTTP response headers: HTTPHeaderDict({\'Content-Type\': \'application/json; charset=utf-8\', \'X-Influxdb-Build\': \'OSS\', \'X-Influxdb-Version\': \'v2.7.12\', \'X-Platform-Error-Code\': \'unauthorized\', \'Date\': \'Thu, 26 Mar 2026 20:42:35 GMT\', \'Content-Length\': \'55\'})\nHTTP response body: {"code":"unauthorized","message":"unauthorized access"}\n\n/opt/venv/lib/python3.10/site-packages/twisted/python/threadpool.py:269:inContext\n/opt/venv/lib/python3.10/site-packages/twisted/python/threadpool.py:285:<lambda>\n/opt/venv/lib/python3.10/site-packages/twisted/python/context.py:117:callWithContext\n/opt/venv/lib/python3.10/site-packages/twisted/python/context.py:82:callWithContext\n/opt/venv/lib/python3.10/site-packages/ocs/ocs_agent.py:1074:_running_wrapper\n/opt/venv/lib/python3.10/site-packages/ocs/agents/influxdb_publisher_v2/agent.py:91:record\n/opt/venv/lib/python3.10/site-packages/ocs/agents/influxdb_publisher_v2/drivers.py:67:__init__\n/opt/venv/lib/python3.10/site-packages/influxdb_client/client/bucket_api.py:101:find_bucket_by_name\n/opt/venv/lib/python3.10/site-packages/influxdb_client/service/buckets_service.py:558:get_buckets\n/opt/venv/lib/python3.10/site-packages/influxdb_client/service/buckets_service.py:586:get_buckets_with_http_info\n/opt/venv/lib/python3.10/site-packages/influxdb_client/_sync/api_client.py:343:call_api\n/opt/venv/lib/python3.10/site-packages/influxdb_client/_sync/api_client.py:173:__call_api\n/opt/venv/lib/python3.10/site-packages/influxdb_client/_sync/api_client.py:365:request\n/opt/venv/lib/python3.10/site-packages/influxdb_client/_sync/rest.py:268:GET\n/opt/venv/lib/python3.10/site-packages/influxdb_client/_sync/rest.py:261:request\n]', 'log_time': 1774557755.7741287}: "'Content-Type'"
2026-03-26T20:42:35+0000 record:0 Status is now "done".

We should catch this and log an appropriate message.

Line numbers are relevant to this commit: b7fddf1