doc: readme and pr doc updates

[randoneering]

Pull Request Summary

Just updating readme and pr template. Changed text in footer of readme and shrunk pr template.

Type of Change

• New health check
• Bug fix
• Performance improvement
• Documentation update
• Refactoring/code cleanup
• Breaking change

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Related Issues

• Fixes #N/A
• Related to #N/A
• Closes #N/A

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Testing

PostgreSQL Version Compatibility

Has this code been tested against the following PostgreSQL versions?

• PostgreSQL 15
• PostgreSQL 16
• PostgreSQL 17
• PostgreSQL 18 (if available)

Testing notes:

Managed Database Platforms

Has this code been deployed and tested on the following platforms?

• Amazon RDS for PostgreSQL
• Amazon Aurora PostgreSQL
• Google Cloud SQL for PostgreSQL
• Azure Database for PostgreSQL
• Self-managed PostgreSQL
• Not applicable / Not tested yet

Platform-specific notes:

Additional Context

Performance Impact:

Breaking Changes:

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Checklist

• Code follows project style guidelines
• Self-review of code completed
• Code comments added for complex logic
• No sensitive information (credentials, internal URLs) included
• Tested locally before submitting
• All checks marked above are complete

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Additional Notes

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