Gcl timestamp overwrite

[Licenser]

Pull request

Description

This PR enables defining a custom timestamp for GCL events instead of using event.ingest_ns.

Checklist

• The RFC, if required, has been submitted and approved
• Any user-facing impact of the changes is reflected in docs.tremor.rs
• The code is tested
• Use of unsafe code is reasoned about in a comment
• Update CHANGELOG.md appropriately, recording any changes, bug fixes, or other observable changes in behavior
• The performance impact of the change is measured (see below)

Performance

-/-

[codecov]

Codecov Report

Merging #2331 (df6adea) into main (f008c7f) will increase coverage by 0.02%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2331      +/-   ##
==========================================
+ Coverage   91.08%   91.10%   +0.02%     
==========================================
  Files         275      275              
  Lines       58211    58220       +9     
==========================================
+ Hits        53020    53040      +20     
+ Misses       5191     5180      -11     

Flag	Coverage Δ
unittests	91.10% <100.00%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/connectors/impls/clickhouse.rs	97.17% <ø> (ø)
src/connectors/impls/gcl.rs	97.50% <ø> (ø)
src/connectors/impls/gcl/writer/meta.rs	99.48% <100.00%> (+0.03%)	⬆️
src/connectors/impls/gcl/writer/sink.rs	85.53% <100.00%> (-0.74%)	⬇️

... and 7 files with indirect coverage changes

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[darach]

LGTM