🐛 Fix basic auth password parsing breaking on : character

[fehwalker]

Fix issue where passwords containing : character break Basic Auth used on API endpoints (particularly OPDS).

[aaronleopold]

This looks great, thank you so much! There was a small lint issue but I went ahead and quickly fixed it. I'll merge this in once CI is ✅

[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 3 lines in your changes missing coverage. Please review.

Files	Patch %	Lines
apps/server/src/utils/auth.rs	84.61%	2 Missing ⚠️
apps/server/src/routers/api/mod.rs	0.00%	1 Missing ⚠️

Files	Coverage Δ
core/src/filesystem/media/builder.rs	68.11% <100.00%> (ø)
apps/server/src/routers/api/mod.rs	0.00% <0.00%> (ø)
apps/server/src/utils/auth.rs	49.09% <84.61%> (ø)