🐛 Fix OPDS thumbnail endpoint

[aaronleopold]

Fixes an issue where generated thumbnails aren't actually being loaded, rather the file is being opened. I also made a note for two items:

• Improve a silly query
• Support STRICT_OPDS configuration, which will convert any non-compliant OPDS images, rather than just always doing it

I will tackle both alongside the image serving work I plan to do this weekend

See Discord for additional context

[aaronleopold]

Verified locally:

  2024-08-22T23:20:37.594117Z TRACE stump_server::routers::api::v1::media: Found generated media thumbnail, path: "/Users/aaronleopold/.stump/thumbnails/ddcda452-eb6f-43c9-aac3-181a64f72fa3.png", media_id: "ddcda452-eb6f-43c9-aac3-181a64f72fa3"
    at apps/server/src/routers/api/v1/media.rs:1031
    in tower_http::trace::make_span::request with method: GET, uri: /opds/v1.2/books/ddcda452-eb6f-43c9-aac3-181a64f72fa3/thumbnail, version: HTTP/1.1

  2024-08-22T23:20:37.594424Z TRACE stump_server::routers::opds::v1_2: OPDS legacy image detected, returning as-is

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Files	Patch %	Lines
apps/server/src/routers/opds/v1_2.rs	0.00%	3 Missing ⚠️

Files	Coverage Δ
apps/server/src/routers/api/v1/media.rs	0.00% <ø> (ø)
apps/server/src/routers/opds/v1_2.rs	0.00% <0.00%> (ø)