fix: add model author for model source

[vansangpfiev]

Describe Your Changes

This pull request includes significant changes to the ModelSourceService class and related utilities to enhance the handling of model sources and caching. The key updates involve the introduction of a caching mechanism, renaming variables for clarity, and adding new utility functions.

Enhancements to ModelSourceService:

• Introduced a caching mechanism to store and retrieve model sources efficiently using a new src_cache_ member and the GenSourceId function. (engine/services/model_source_service.cc: [1] [2] [3] [4]; engine/services/model_source_service.h: [5]
• Renamed variables from author to hub_author across multiple methods to improve code clarity and consistency. (engine/services/model_source_service.cc: [1] [2] [3] [4] [5] [6] [7] [8] [9]; engine/services/model_source_service.h: [10]

Utility Function Additions:

• Added GetModelAuthorCortexsoHub function to fetch the model author from the Cortexso hub metadata. (engine/utils/huggingface_utils.h: engine/utils/huggingface_utils.hR314-R333)

URL Parsing Improvements:

• Enhanced the SplitPathParams function to return a boolean indicating success or failure, and updated the FromUrlString function to handle malformed URLs more robustly. (engine/utils/url_parser.h: [1] [2] [3]

Fixes Issues

• Closes #
• Closes #

Self Checklist

• Added relevant comments, esp in complex areas
• Updated docs (for bug fixes / features)
• Created issues for follow-up changes or refactoring needed