added migration for reverse geocoding

migrations/004_reverse_geocoding.sql

@@ -0,0 +1,8 @@
+-- =====================================================================
+-- Migration 004: Adds Address Column for Reverse Geocoding
+-- =====================================================================
+
+ALTER TABLE contributions
+    ADD COLUMN address VARCHAR(255) DEFAULT NULL;
+
+COMMENT ON COLUMN contributions.address IS 'Reverse geocoded Address, stored automatically on Creation.';