test: add basic tests for cache-search & network fetchers

test: enable debug
test: add pytest.ini to mark tests that require network
fix: cache-search should not aquire full match of artists due to different translations
fix: replace dynamic f-string SQL in track WHERE clauses with parameterized nullable conditions
refactor: lrc.py should never directly call print, return a str instead
chore: add requirements.txt (via 'uv export')
chore: update README.md with dev instructions

lrx_cli/cli.py

@@ -120,7 +120,7 @@ def fetch(
         logger.error("Only unsynced lyrics available (--only-synced requested).")
         sys.exit(1)
 
-    result.lyrics.print_lyrics(plain=plain)
+    print(result.lyrics.to_lrc(plain=plain))
 
 
 # search
@@ -208,7 +208,7 @@ def search(
         logger.error("Only unsynced lyrics available (--only-synced requested).")
         sys.exit(1)
 
-    result.lyrics.print_lyrics(plain=plain)
+    print(result.lyrics.to_lrc(plain=plain))
 
 
 # export