Add project logo and favicon, improve test data reset

Added logo and favicon images to documentation static assets. Updated DataFaker to clear records before inserting test data. Improved SQLite test fixture to handle file deletion errors gracefully.

Author: MacHu-GWU

docs/source/_static/sqlalchemy_upsert_kit-favicon.ico

@@ -214,6 +214,7 @@ def prepare_existing_data(self, engine: sa.Engine):
         :param engine: SQLAlchemy engine for database operations
         """
         with engine.connect() as conn:
+            conn.execute(t_record.delete())
             conn.execute(t_record.insert(), self.existing_data)
             conn.commit()
 

docs/source/_static/sqlalchemy_upsert_kit-logo.png

@@ -31,7 +31,10 @@ def clean_database(data_faker):
     Fixture to ensure clean database state for each test.
     """
     dir_tmp.mkdir(parents=True, exist_ok=True)
-    path_sqlite.unlink(missing_ok=True)
+    try:
+        path_sqlite.unlink(missing_ok=True)
+    except:
+        pass
     engine = sa.create_engine(f"sqlite:///{path_sqlite}")
     Base.metadata.create_all(engine)
     data_faker.prepare_existing_data(engine)