chore: Changed the data type for currency rate from float to numeric

Author: Redume

chart/database/schemas/data.sql

@@ -1,7 +1,7 @@
 CREATE TABLE if not exists currency(
     from_currency TEXT NOT NULL,
     conv_currency TEXT NOT NULL,
-    rate FLOAT NOT NULL,
+    rate NUMERIC(30) NOT NULL,
     date DATE NOT NULL
 );
 

shared/database/data/schema.sql

@@ -1,7 +1,7 @@
 CREATE TABLE IF NOT EXISTS currency(
     from_currency TEXT NOT NULL,
     conv_currency TEXT NOT NULL,
-    rate FLOAT NOT NULL,
+    rate NUMERIC(30) NOT NULL,
     date DATE NOT NULL
 );