* Add S3 object filtering fields to the sources proto
* Skip S3 objects by key prefix or file extension before downloading them
* Document the S3 source and how to narrow a scan to specific objects
* Trim filter entries and report when a filter excludes every object
* Document the S3 object filter edge cases and listing cost
* Align S3 object filter logging with the logging RFC
* Simplify S3 extension matching and always log a fully filtered bucket
Shahzad Haider
54ff78b9a8