Add postgres float 4 to pg dialect float4 support in bulk migration

[sm745052]

Add support for mapping pgFloat4 type in bulk migrations targeting Spanner. This correctly maps Avro to value mapping.

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PR created automatically by Jules for task 9270526303072825437 started by @sm745052

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[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the Avro to Spanner value mapping logic to include support for the PostgreSQL float4 data type. This ensures that data migration processes correctly handle 32-bit floating-point values when targeting Spanner.

Highlights

• Added pgFloat4 support: Included support for mapping the pgFloat4 type in bulk migrations to ensure correct Avro to Spanner value conversion.

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[gemini-code-assist]

Code Review

This pull request adds support for mapping PostgreSQL float4 types to Spanner float32 values in the AvroToValueMapper class. I have no feedback to provide as there are no review comments to evaluate.

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 63.28%. Comparing base (6cc1219) to head (185516d).
⚠️ Report is 11 commits behind head on main.

Files with missing lines	Patch %	Lines
.../v2/spanner/migrations/avro/AvroToValueMapper.java	66.66%	1 Missing ⚠️

❌ Your patch check has failed because the patch coverage (66.66%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3885      +/-   ##
============================================
+ Coverage     55.54%   63.28%   +7.73%     
+ Complexity     6574     2315    -4259     
============================================
  Files          1103      514     -589     
  Lines         67570    29952   -37618     
  Branches       7581     3300    -4281     
============================================
- Hits          37531    18954   -18577     
+ Misses        27624    10035   -17589     
+ Partials       2415      963    -1452     

Components	Coverage Δ
spanner-templates	88.71% <66.66%> (+0.40%)	⬆️
spanner-import-export	∅ <ø> (∅)
spanner-live-forward-migration	90.13% <66.66%> (-0.09%)	⬇️
spanner-live-reverse-replication	83.90% <66.66%> (-0.07%)	⬇️
spanner-bulk-migration	92.56% <66.66%> (-0.06%)	⬇️
gcs-spanner-dv	90.36% <66.66%> (+1.35%)	⬆️

Files with missing lines	Coverage Δ
.../v2/spanner/migrations/avro/AvroToValueMapper.java	93.88% <66.66%> (-0.29%)	⬇️

... and 614 files with indirect coverage changes

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