Add Docker Compose setup and expand loader tests

[Teagan42]

What

• add docker-compose.yml for running Qdrant and the MCP server
• document Docker Compose usage and improve project intro
• cover loader edge cases for missing metadata
• add CLI options for server transport configuration

Why

• simplify local deployment with Docker Compose
• ensure loader handles absent metadata cleanly
• allow selecting transport protocol and network settings via CLI

Affects

• documentation
• loader unit tests
• project deployment config
• server CLI

Testing

• uv run ruff check .
• uv run pytest

Documentation

• updated README.md

---

https://chatgpt.com/codex/tasks/task_e_68b4255383248328b0c9852f54be7f8c

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
mcp_plex
loader.py	179	10	94%	32–34, 296, 299–302, 523, 529
server.py	185	7	96%	304, 324–328, 361
TOTAL	466	17	96%

Tests	Skipped	Failures	Errors	Time
19	0 💤	0 ❌	0 🔥	9.585s ⏱️