Revision number is being stored as an integer

[n8maninger]

ERROR   explorer        failed to sync store    {"error": "failed to process updates: failed to update chain state: failed to apply chain update \"8502::7afcc480\": v: failed to add file contracts: addFileContractElements: failed to execute file_contract_elements statement: sql: converting argument $10 type: uint64 values with high bit set are not supported"}

SQLite doesn't support uint64 natively. You need to call encode and decode when working with contract revision numbers since we use math.MaxUint64 to lock contracts. Should have been caught in #28, my bad