feat(dynamodb): add ScanFilter support for Scan operation

[naile]

Summary

Adds support for the ScanFilter parameter in DynamoDB Scan requests.

ScanFilter is the legacy condition-based filter for Scan, still actively used on the wire by high-level SDK abstractions such as the .NET Table.Scan() API and Java SDK v1's Document API.

Type of change

• New feature (feat:)

AWS Compatibility

Reuses the ComparisonOperator / AttributeValueList structure from QueryFilter / key conditions already implemented in Floci.

Checklist

• ./mvnw test passes locally
• New or updated integration test added
• Commit messages follow Conventional Commits

[Copilot]

Pull request overview

Adds legacy DynamoDB ScanFilter request support to Floci’s DynamoDB Scan implementation to improve AWS wire-compatibility with older/high-level SDK abstractions.

Changes:

• Extend DynamoDbService.scan(...) to accept ScanFilter and apply it during scan evaluation.
• Wire ScanFilter parsing in DynamoDbJsonHandler for DynamoDB_20120810.Scan.
• Add unit + integration tests covering basic ScanFilter operators (EQ, GE).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 6 comments.

File	Description
src/main/java/io/github/hectorvent/floci/services/dynamodb/DynamoDbService.java	Adds scanFilter parameter and implements matchesScanFilter() for legacy ScanFilter evaluation.
src/main/java/io/github/hectorvent/floci/services/dynamodb/DynamoDbJsonHandler.java	Parses ScanFilter from Scan requests and forwards it into the service layer.
src/test/java/io/github/hectorvent/floci/services/dynamodb/DynamoDbServiceTest.java	Updates/extends service-level tests to include ScanFilter scenarios (but signature updates are incomplete).
src/test/java/io/github/hectorvent/floci/services/dynamodb/DynamoDbIntegrationTest.java	Adds HTTP-level integration coverage for ScanFilter over the DynamoDB JSON 1.1 protocol.

[hectorvent]

Hi @naile,

Thanks for taking the time to contribute! We've seen your PR and will take a look soon.

To ensure this implementation stays robust, could you also open a PR in our compatibility suite at https://github.com/hectorvent/floci-compatibility-tests? This helps us validate that your changes keep working perfectly as the project evolves.

Also please look at the copilot review comments

The Floci team

[naile]

Hi @naile,

Thanks for taking the time to contribute! We've seen your PR and will take a look soon.

To ensure this implementation stays robust, could you also open a PR in our compatibility suite at https://github.com/hectorvent/floci-compatibility-tests? This helps us validate that your changes keep working perfectly as the project evolves.

Also please look at the copilot review comments

The Floci team

Went over and addressed the copilot comments - for pre-existing behaviors/limitations I think these are better to fix separately to keep the scope small. Let me know if you prefer another strategy. I will add a companion compatability test.

[hectorvent]

Hello @naile,

Thanks for the PR!

Could you please update the commit history to remove the Co-authored-by: Claude <...> line from the commit message? We prefer to keep the attribution focused on human contributors for this project. Once that's cleaned up, I'm happy to take another look!