Fixes profiles export source prefix to end in slash

[ellisonmarks]

google.api_core.exceptions.InvalidArgument: 400 GCS source Path argument must end with '/'

[sentry]

Bug: export_replay_blob_data creates GCS transfer jobs with source_prefix values missing a trailing slash, violating GCS API requirements.
_{Severity: CRITICAL | Confidence: 1.00}

🔍 Detailed Analysis

The export_replay_blob_data function in src/sentry/replays/data_export.py constructs source_prefix values like "30/1", "60/1", "90/1" without a trailing slash. The Google Cloud Storage Transfer Service API requires source paths to end with a /. This will cause google.api_core.exceptions.InvalidArgument: 400 GCS source Path argument must end with '/' errors when attempting to create transfer jobs, making replay blob exports non-functional.

💡 Suggested Fix

Modify src/sentry/replays/data_export.py to append a trailing slash to source_prefix in export_replay_blob_data, e.g., source_prefix=f"{retention_days}/{project_id}/". Update test_export_replay_blob_data() to assert the correct path format.

🤖 Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent.
Verify if this is a real issue. If it is, propose a fix; if not, explain why it's not
valid.

Location: src/sentry/profiles/data_export.py#L47

Potential issue: The `export_replay_blob_data` function in
`src/sentry/replays/data_export.py` constructs `source_prefix` values like `"30/1"`,
`"60/1"`, `"90/1"` without a trailing slash. The Google Cloud Storage Transfer Service
API requires source paths to end with a `/`. This will cause
`google.api_core.exceptions.InvalidArgument: 400 GCS source Path argument must end with
'/'` errors when attempting to create transfer jobs, making replay blob exports
non-functional.

_{Did we get this right? 👍 / 👎 to inform future reviews.}

_{Reference_id: 2760760}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #103509      +/-   ##
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+ Coverage   78.03%    80.68%   +2.65%     
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  Files        9245      9247       +2     
  Lines      394973    394995      +22     
  Branches    25190     25190              
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+ Hits       308215    318701   +10486     
+ Misses      86327     75863   -10464     
  Partials      431       431