test: add negative cache and settings tests

[Teagan42]

What

• add MediaCache eviction and clear tests
• add IMDbCache persistence and invalid file tests
• add Settings env override and invalid value tests
• check _gather_in_batches failure on zero batch size
• bump version to 0.26.23

Why

• increase test coverage and ensure negative paths behave correctly

Affects

• test suite and project version

Testing

• uv run ruff check .
• uv run pytest

Documentation

• none needed

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https://chatgpt.com/codex/tasks/task_e_68c6752c6bf083289af78ee432d3067a

[Copilot]

Pull Request Overview

This PR adds comprehensive negative test cases to improve test coverage for error conditions and edge cases across the caching, configuration, and batch processing modules. The changes also bump the project version to 0.26.23.

• Add MediaCache eviction behavior and clear functionality tests
• Add IMDbCache persistence and invalid file handling tests
• Add Settings environment override and validation error tests
• Add batch processing failure test for zero batch size

Reviewed Changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/test_imdb_cache.py	New test file covering IMDbCache persistence and invalid JSON file handling
tests/test_gather_in_batches.py	Added test for zero batch size validation error
tests/test_config.py	New test file covering Settings environment override and validation errors
tests/test_cache.py	New test file covering MediaCache eviction, clear operations, and missing key handling
pyproject.toml	Version bump from 0.26.22 to 0.26.23

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[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
mcp_plex
loader.py	354	19	95%	90, 119–128, 139, 141–143, 179, 542–544
server.py	298	22	93%	59–60, 102–103, 226, 454, 458, 480–486, 518, 528, 559–560, 577–578, 601, 604–605, 663
TOTAL	833	41	95%

Tests	Skipped	Failures	Errors	Time
56	0 💤	0 ❌	0 🔥	35.107s ⏱️

[Copilot]

Pull Request Overview

Copilot reviewed 9 out of 10 changed files in this pull request and generated 2 comments.

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