tracker.run_id stays None when OutputMethod.API is enabled, CSV rows record run_id="None"

Problem

When OutputMethod.API is enabled, EmissionsTracker.run_id stays None for the whole run. Every emission record stringifies it, so all CSV rows are written with the literal string "None" instead of a real run id, and the data can no longer be joined with what the API stored under a real UUID.

Reproduction

from codecarbon import EmissionsTracker
from codecarbon.output import OutputMethod

tracker = EmissionsTracker(output_methods=[OutputMethod.CSV, OutputMethod.API], api_key="...")
print(tracker.run_id)  # None
tracker.start(); ...; tracker.stop()
# emissions.csv -> run_id column contains "None"

Root cause

emissions_tracker.py:648 takes the id eagerly from the API output handler:

self.run_id = cc_api__out.run_id

but CodeCarbonAPIOutput.__init__ builds its ApiClient with create_run_automatically=False (output_methods/http.py:51-58), so ApiClient.run_id is still the class attribute None (core/api_client.py:36). The run is created lazily later in CodeCarbonAPIOutput._ensure_api_run (output_methods/http.py:60-63), which updates the handler's id but never writes back to the tracker. emissions_tracker.py:1049 then records run_id=str(self.run_id) → "None".

Expected vs actual

Expected: tracker.run_id is never None, and matches the API run id once the run exists.

Actual: it is None, with knock-on effects:

• on_csv_write="update" matches rows on df.run_id == total.run_id (output_methods/file.py:109); with every run writing "None", a second run overwrites the first run's row, and a third logs "CSV contains more than 1 rows with current run ID".
• FileOutput.task_out builds per-task filenames as emissions_<experiment>_<run_id>.csv (output_methods/file.py:134-137), so every run's task data collides in emissions_<experiment>_None.csv.
• The BOAMPS output names its report boamps_report_None.json (output_methods/boamps/output.py:155) for the same reason.

Start with emissions_tracker.py around lines 648 and 1049, then read CodeCarbonAPIOutput in output_methods/http.py around lines 51-63 and the related CSV logic in output_methods/file.py. Run the provided API-plus-CSV reproduction and verify that tracker.run_id matches the API run and that CSV, task, and BOAMPS outputs no longer use None.