feat: implement filesize validation for movies and episodes

Walkthrough

The changes introduce a new exception class, InvalidFileSizeException, and a new result class, DownloadCachedStreamResult, to the Downloader class in src/program/services/downloaders/__init__.py. The download_cached_stream method now returns an instance of this class. The run method has been updated to validate file sizes using the new validate_filesize method. Additionally, the FileFinder class in src/program/services/downloaders/shared.py has been refactored to use global variables for file size limits and modularize validation logic. Default values for minimum file sizes in DownloadersModel have been updated to enforce non-negative constraints.

Changes

File Path	Change Summary
`src/program/services/downloaders/__init__.py`	Added `InvalidFileSizeException` and `DownloadCachedStreamResult`. Updated `download_cached_stream` to return `DownloadCachedStreamResult`. Introduced `validate_filesize` and `_get_item_media_type` methods. Modified `update_item_attributes` for media type validation.
`src/program/services/downloaders/shared.py`	Refactored `FileFinder` class to use global variables for file size limits. Added functions for file size validation and centralized checks.
`src/program/settings/models.py`	Updated default values for `movie_filesize_mb_min` and `episode_filesize_mb_min` from `-1` to `0` in `DownloadersModel`.
`src/program/media/__init__.py`	Expanded imports to include `ShowMediaType`, `MovieMediaType`, and `MediaType`.
`src/program/media/item.py`	Introduced enumerations `ShowMediaType`, `MovieMediaType`, and `MediaType`. Updated `MediaItem` subclasses to use these enumerations instead of strings.
`src/program/utils/request.py`	Removed logging for rate limits and request failures in `_request`. Updated `handle_response` to raise `RateLimitExceeded` exception and added type hints.
`src/program/services/scrapers/__init__.py`	Modified `scrape` method to convert keys in `service_results` to lowercase for consistency.

Possibly related PRs

859: The main PR introduces a new exception class and modifies the Downloader class, while the retrieved PR focuses on integrating dependency injection across various services, including the Downloader. This connection suggests that the changes in the main PR may benefit from the dependency injection framework established in the retrieved PR.

Suggested reviewers

Gaisberg

Poem

In the burrow where files do play,
New checks for sizes come to stay.
Movies and shows, now fit just right,
Validations shine, oh what a sight!
A hop, a skip, through code we glide,
With size checks strong, we take great pride! 🐇✨

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rivenmedia / riven