chore: add warning for measurement name starts with hash

[bednar]

Closes #473

Proposed Changes

Added warning for measurement name starts with #:

The measurement name '#my_measurement' start with '#'.

The output Line protocol will be interpret as a comment by InfluxDB. For more info see:

• https://docs.influxdata.com/influxdb/latest/reference/syntax/line-protocol/#comments

Checklist

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

[codecov-commenter]

Codecov Report

Merging #495 (2b330e1) into master (fade9e0) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #495      +/-   ##
==========================================
+ Coverage   90.52%   90.53%   +0.01%     
==========================================
  Files          39       39              
  Lines        3355     3359       +4     
==========================================
+ Hits         3037     3041       +4     
  Misses        318      318              

Impacted Files	Coverage Δ
influxdb_client/client/write/point.py	96.77% <100.00%> (+0.08%)	⬆️

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[powersj]

I am generally good with only doing this check to the Point helper class. I do not think this actually helps the original reporter, but I think referencing the docs is good enough as it seems less than ideal to loop through every datapoint beforehand.

[bednar]

I think it can also help to the reporter because the write_api uses a Point to write dictionary:

influxdb-client-python/influxdb_client/client/write/point.py

Line 61 in 540a2dc

def from_dict(dictionary: dict, write_precision: WritePrecision = DEFAULT_WRITE_PRECISION, **kwargs):