feat(aws-data-processing-mcp-server): Add Support for EMR-S Job and Application

[naikvaib]

Summary

Changes

Implementation of EMR Serverless (EMR-S) Tools for jobs and applications compliance with MCP resource management standards.

Please provide a summary of what's being changed

• EMR Serverless Application and Job Run Tools introduced
• EMR Serverless Application and Job Run handlers properly implement MCP tagging
• Resource creation automatically adds MCP management tags (ManagedBy: DataprocessingMcpServer, ResourceType, CreatedAt)
• Update/delete operations verify MCP management before allowing modifications
• Implementation follows same patterns as Athena, Glue, and EMR-EC2 services
• Comprehensive test coverage exists for all tagging scenarios
• CUSTOM_TAGS environment variable support is properly implemented

User experience

Before: Users had no support to work on EMR Serverless functionality

After: Users can confidently use EMR Serverless tools knowing that:

• All created resources are properly tagged for MCP management
• Resources created outside MCP cannot be accidentally modified/deleted
• Tagging behavior can be customized via CUSTOM_TAGS environment variable
• Full compatibility with existing Athena, Glue, and EMR-EC2 resource management patterns

Checklist

If your change doesn't seem to apply, please leave them unchecked.

• I have reviewed the contributing guidelines
• I have performed a self-review of this change
• Changes have been tested
• Changes are documented

Is this a breaking change? No

RFC issue number: #1201

Checklist:

• Migration process documented
• Implement warnings (if it can live side by side)

Acknowledgment

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of the project license.

[codecov]

Codecov Report

❌ Patch coverage is 89.76190% with 43 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.19%. Comparing base (d6344f8) to head (9347ed6).

Files with missing lines	Patch %	Lines
...handlers/emr/emr_serverless_application_handler.py	90.35%	9 Missing and 10 partials ⚠️
.../aws_dataprocessing_mcp_server/utils/aws_helper.py	9.52%	19 Missing ⚠️
...ver/handlers/emr/emr_serverless_job_run_handler.py	96.06%	2 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1881      +/-   ##
==========================================
- Coverage   90.42%   90.19%   -0.23%     
==========================================
  Files         851      698     -153     
  Lines       63317    55849    -7468     
  Branches    10253     9315     -938     
==========================================
- Hits        57254    50373    -6881     
+ Misses       3772     3358     -414     
+ Partials     2291     2118     -173     

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