* All postgres related functions now live in internal/store.
* Updated queries.sql file to match struct order (readibility)
* Moved keystore -> store
* Moved queries -> store
* Removed pkg/postgres
* otx can nw be tracked at /api/track/:trackingId
* moved queries to queries folder
* fixed validation error check in ErrorHandler
* added enum package with enum types
* updated migrations: added enum tables