feat: better expose HTTP Error header information in error handling on write

[karel-rehor]

Proposed Changes

Http Headers are already part of InfluxException. In the WriteApi they can be accessed with an EventListener. With WriteApiBlocking they get thrown in write method calls.

• print selected headers useful for debugging to error logs
• add an example of working with headers from InfluxException

Note that Cloud v3 and OSS v2 handle exceptional streamed or batched data on the server side a little bit differently. It appears that with v3 cloud batches of data that include some invalid records along with valid ones, will still write the valid records and return a success HTTP status code. OSS v2 on the other hand returns an error status triggering an exception.

Checklist

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

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 77.77778% with 2 lines in your changes missing coverage. Please review.

Project coverage is 88.50%. Comparing base (7b39e0c) to head (3824efe).
Report is 9 commits behind head on master.

Files	Patch %	Lines
.../influxdb/client/write/events/WriteErrorEvent.java	77.77%	1 Missing and 1 partial ⚠️

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Additional details and impacted files

@@             Coverage Diff              @@
##             master     #745      +/-   ##
============================================
- Coverage     88.51%   88.50%   -0.02%     
+ Complexity      786      785       -1     
============================================
  Files           174      174              
  Lines          7195     7203       +8     
  Branches        405      405              
============================================
+ Hits           6369     6375       +6     
- Misses          696      697       +1     
- Partials        130      131       +1     

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[bednar]

LGTM 🚀