Expand media artwork caching across identifiers

[Teagan42]

What

• cache poster and background artwork for every normalized identifier collected by _get_media_data
• reuse a shared helper for rating-key lookups so poster/background endpoints populate caches for alternate IDs
• add a regression test that ensures artwork requests via IMDb IDs reuse cached data instead of refetching
• bump the project version metadata to 2.0.20 across manifests and lock file

Why

• requests for posters/backgrounds using secondary identifiers were missing cache hits because artwork was stored only under the rating key
• sharing caching logic across call sites avoids duplication and keeps rating-key compatibility while expanding coverage

Affects

• media artwork helper routines in mcp_plex.server.media
• media poster/background resources in mcp_plex.server.tools.media_library
• project metadata in pyproject.toml, docker/pyproject.deps.toml, and uv.lock
• additional server media resource tests

Testing

• uv run ruff check .
• uv run pytest

Documentation

• none required

---

https://chatgpt.com/codex/tasks/task_e_68ef552604708328a583c917cca52c9a

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
mcp_plex/loader
__init__.py	183	11	94%	139, 209, 323–325, 327, 416–435
qdrant.py	202	3	99%	343–349
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	396	21	95%	124, 130–133, 152, 158–160, 256, 318, 336–337, 345, 420, 514, 544, 563, 570, 589, 702
cli.py	75	2	97%	44, 96
config.py	83	1	99%	63
media.py	260	24	91%	144, 175, 191, 232–238, 247–250, 288–295, 318, 352, 358, 364, 382–383
mcp_plex/server/tools
media_library.py	340	12	96%	206, 579, 677, 696, 747, 798, 869, 959–963
TOTAL	3011	179	94%

Tests	Skipped	Failures	Errors	Time
207	0 💤	0 ❌	0 🔥	1m 24s ⏱️