Test yaml

[tarun-google]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @tarun-google, 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 delivers a new YAML-based Dataflow template designed for batch data migration from PostgreSQL to Iceberg. It encompasses the template's definition, crucial updates to the YAML processing logic for improved modularity and Jinja templating, and the necessary dependencies. The changes also include new YAML option files for streamlined parameter management and a dedicated integration test to ensure the template's reliability and correctness.

Highlights

• New Postgres to Iceberg YAML Template: Introduces a new batch Dataflow template for transferring data from PostgreSQL to Iceberg tables, defined entirely using YAML.
• Enhanced YAML Processing: Updates the core Python script (main.py) to support modular YAML options files and intelligent cleanup of undefined Jinja template variables, making YAML templates more flexible and robust.
• Modular YAML Options: Adds dedicated YAML files (postgres_options.yaml, iceberg_options.yaml) to define reusable parameter groups for database and data lake configurations.
• Comprehensive Integration Testing: Includes a new Java integration test (PostgresToIcebergYamlIT.java) to validate the end-to-end functionality of the Postgres to Iceberg YAML template.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.41%. Comparing base (486fcef) to head (77d3afb).
⚠️ Report is 23 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3050      +/-   ##
============================================
+ Coverage     50.25%   50.41%   +0.16%     
  Complexity     5019     5019              
============================================
  Files           967      969       +2     
  Lines         59264    59548     +284     
  Branches       6458     6493      +35     
============================================
+ Hits          29782    30023     +241     
- Misses        27377    27402      +25     
- Partials       2105     2123      +18     

Components	Coverage Δ
spanner-templates	70.63% <ø> (+0.18%)	⬆️
spanner-import-export	68.98% <ø> (ø)
spanner-live-forward-migration	80.04% <ø> (+0.35%)	⬆️
spanner-live-reverse-replication	77.46% <ø> (+0.36%)	⬆️
spanner-bulk-migration	88.28% <ø> (-0.05%)	⬇️
see 12 files with indirect coverage changes

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