Add database internal edit_* tables CUID, CSS loading style

all edit_* have CUID random alphanumeric unique id with 12 characters
length.
automatically created on INSERT and not touched on update.
but can be udpated manually on UPDATE command.
on INSERT cuid is ALWAYS overwritten with auto create

Add CSS loading style sheet

4dev/database/function/random_string.sql

@@ -0,0 +1,18 @@
+-- create random string with length X
+
+CREATE FUNCTION random_string(randomLength int)
+RETURNS text AS $$
+SELECT array_to_string(
+	ARRAY(
+		SELECT substring(
+			'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789',
+			trunc(random() * 62)::int + 1,
+			1
+		)
+		FROM generate_series(1, randomLength) AS gs(x)
+	),
+	''
+)
+$$ LANGUAGE SQL
+RETURNS NULL ON NULL INPUT
+VOLATILE; -- LEAKPROOF;

4dev/database/function/set_generic.sql

@@ -1,9 +1,12 @@
 -- adds the created or updated date tags
 
 CREATE OR REPLACE FUNCTION set_generic() RETURNS TRIGGER AS '
+	DECLARE
+		random_length INT = 12; -- that should be long enough
 	BEGIN
 		IF TG_OP = ''INSERT'' THEN
 			NEW.date_created := ''now'';
+			NEW.cuid := random_string(random_length);
 		ELSIF TG_OP = ''UPDATE'' THEN
 			NEW.date_updated := ''now'';
 		END IF;