test: adjust partial writes test to v3.10 behaviour

[NguyenHoangSon96]

Closes #

Proposed Changes

• Influxdb3 (3.10 released yesterday) returns different errors, so we need to update our tests to accommodate it.
• InfluxDB 3.10 write-error behavior

Endpoint	accept_partial	HTTP	Data written	Expected client behaviour?
v2	true	400, code="invalid"	None	API Exception/Error
v2	false	400, code="invalid"	None	API Exception/Error
v3	true	400, error="partial write of line protocol occurred", data=array	Valid lines written	PartialWrite Exception/Error
v3	false	400, error="line protocol parsing error", data=object	None	API Exception

• Fix gpg download scripts.

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• A test has been added if appropriate
• Tests pass
• Commit messages are conventional
• Sign CLA (if not already signed)

[Copilot]

Pull request overview

Adjusts the integration tests for write error handling to match InfluxDB v3.10 behavior, specifically differentiating between partial-write errors vs. hard failures depending on accept_partial and API version.

Changes:

• Update test_v3_error to assert InfluxDBPartialWriteError only when accept_partial=True, otherwise assert ApiException with the expected v3 error payload.
• Update test_v2_error to expect ApiException for both accept_partial settings and validate the v2 error JSON structure.
• Add JSON parsing to validate structured error bodies returned by the server.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.90%. Comparing base (665d998) to head (6b35fcc).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #218      +/-   ##
==========================================
+ Coverage   77.65%   78.90%   +1.24%     
==========================================
  Files          38       36       -2     
  Lines        2721     2607     -114     
==========================================
- Hits         2113     2057      -56     
+ Misses        608      550      -58     

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[NguyenHoangSon96]

Hi @alespour ,
My #217 could take forerver to finish so I moved your fixs to here so this fix will be available in main
branch ASAP.

[alespour]

LGTM