Merge concept version of database-lib

Closes https://git.gfz-potsdam.de/dynamicexposure/collaboration/-/issues/488

\approve @ds @shinde @tara

databaselib/database.py

@@ -29,9 +29,9 @@ class AbstractDatabase(abc.ABC):
     database connection and cursor.
 
     Attributes:
-        connection (sqlite3.Connection):
+        connection:
             Database connection.
-        cursor (sqlite3.Cursor):
+        cursor:
             Database cursor.
     """
 
@@ -142,7 +142,7 @@ class SpatialiteDatabase(AbstractDatabase):
         self.cursor = self.connection.cursor()
 
 
-class PostgisDatabase(AbstractDatabase):
+class PostGISDatabase(AbstractDatabase):
     """
     The PostgisDatabase class represents a Postgis database. It manages the
     database connection and cursor.
@@ -170,9 +170,9 @@ class PostgisDatabase(AbstractDatabase):
             Username for the database connection.
         password (str):
             Password for the database connection.
-        connection (sqlite3.Connection):
+        connection (psycopg2.Connection):
             Database connection.
-        cursor (sqlite3.Cursor):
+        cursor (psycopg2.Cursor):
             Database cursor.
     """