feat: support similarity seeds in query media

[Teagan42]

What

• add a similar_to seed option to the query-media tool and reuse keyword filters for candidate restriction
• return no results when none of the requested seeds resolve to indexed points
• cover similarity-driven querying in the server tool tests and bump the project version

Why

• enable recommendation-style discovery flows without leaving the structured query surface

Affects

• server media library tool query logic and regression tests

Testing

• uv run pytest

Documentation

• not needed

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https://chatgpt.com/codex/tasks/task_e_68e4f7a02bd88328b2a9de9ecb0aab35

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
mcp_plex/loader
__init__.py	182	11	94%	139, 209, 323–325, 327, 416–435
qdrant.py	198	2	99%	338–343
samples.py	41	3	93%	55–57
mcp_plex/loader/pipeline
enrichment.py	520	75	86%	234, 255–261, 314, 319, 350, 352, 359, 361, 461, 482, 502, 510–512, 515–519, 522–524, 532–537, 545, 596–597, 621, 679–680, 696, 723, 730, 732, 736, 788, 806, 818, 847, 853, 856–864, 890, 893–895, 912–914, 934–937, 941, 955–959, 981, 983, 986–988
ingestion.py	155	13	92%	82, 133–153, 188, 225, 241, 334, 340, 358
orchestrator.py	95	5	95%	60, 136, 165, 188–189
persistence.py	130	9	93%	123, 165–166, 174, 185, 189–191, 240
mcp_plex/server
__init__.py	351	12	97%	201, 263, 281–282, 290, 365, 459, 489, 508, 515, 534, 647
cli.py	62	1	98%	73
config.py	82	1	99%	59
mcp_plex/server/tools
media_library.py	305	6	98%	521, 846–850
TOTAL	2716	138	95%

Tests	Skipped	Failures	Errors	Time
194	0 💤	0 ❌	0 🔥	1m 17s ⏱️