docs: clarify uv usage guidance

[Teagan42]

What

• tighten the dependency management guidance to explicitly require uv and forbid other tooling
• direct contributors to inspect installed packages within the uv-managed virtual environment
• bump the project version metadata

Why

• document the preferred workflow so future updates remain consistent with the existing toolchain
• ensure package inspections focus on the correct environment rather than the system interpreter

Affects

• contributor documentation in AGENTS.md
• project version recorded in pyproject.toml and uv.lock

Testing

• Not run (documentation-only change)

Documentation

• Updated AGENTS.md with the new guidance

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https://chatgpt.com/codex/tasks/task_e_68db963434c48328b358e65198d36298

[Copilot]

Pull Request Overview

This PR clarifies dependency management guidance by explicitly requiring uv as the sole Python package manager and updates project version metadata. The changes ensure contributors follow a consistent workflow and inspect packages in the correct environment.

• Updated contributor documentation to forbid fallback to pip/poetry and require uv exclusively
• Added guidance to inspect packages within uv-managed virtual environment rather than system Python
• Bumped project version from 0.26.30 to 0.26.31

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
AGENTS.md	Enhanced dependency management section with stricter uv requirements and environment inspection guidance
pyproject.toml	Updated project version number to 0.26.31

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[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
mcp_plex
loader.py	417	28	93%	70, 73–74, 150, 179–183, 185–194, 205, 207–209, 225, 251, 652–654
server.py	321	21	93%	112–113, 236, 464, 468, 490–496, 528, 538, 569–570, 587–588, 611, 614–615, 662, 699
TOTAL	919	49	95%

Tests	Skipped	Failures	Errors	Time
66	0 💤	0 ❌	0 🔥	32.411s ⏱️