feat: add media image resources

[Teagan42]

What

• add MCP resources for media poster and background image URLs
• rely on fastmcp and qdrant-client packages instead of local stubs
• update lockfile to match project version

Why

• expose media artwork through the MCP interface
• depend on real packages managed by uv

Affects

• server resource surface
• dependency handling and lockfile

Testing

• uv run ruff check .
• uv run --extra dev python -m pytest

Documentation

• none

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https://chatgpt.com/codex/tasks/task_e_68b3dadfef248328909f0d350aa0620e

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
mcp_plex
loader.py	179	10	94%	32–34, 296, 299–302, 486, 492
server.py	70	4	94%	33–34, 163, 183
TOTAL	351	14	96%

Tests	Skipped	Failures	Errors	Time
11	0 💤	0 ❌	0 🔥	6.029s ⏱️