More progress re: #34

- Change of direction, LRCLib searches from /lyric/search now use internal cache - which is a PGSQL import of the LRCLib SQLite database.  Change to PGSQL was made for performance.

endpoints/constructors.py

@@ -110,25 +110,6 @@ class ValidLyricRequest(BaseModel):
     }
 
 
-class ValidLRCLibRequest(BaseModel):
-    """
-    Request model for lyric search.
-
-    Attributes:
-    - **artist** (str): Artist.
-    - **song** (str): Song.
-    - **duration** (Optional[int]): Optional duration.
-    """
-
-    artist: Optional[str] = None
-    song: Optional[str] = None
-    duration: Optional[int] = None
-
-    model_config = {
-        "json_schema_extra": {"examples": [{"artist": "eminem", "song": "rap god"}]}
-    }
-
-
 class ValidTypeAheadRequest(BaseModel):
     """
     Request model for typeahead query.