Add TCKDB upload package

Author: calvinp0

arc/tckdb/__init__.py

@@ -0,0 +1,10 @@
+"""ARC-side TCKDB integration: build, write, and optionally upload conformer/calculation payloads.
+
+The chemistry/provenance mapping lives here in ARC. Transport lives in
+``tckdb-client``. Server-side validation/persistence lives in TCKDB.
+"""
+
+from arc.tckdb.adapter import TCKDBAdapter, UploadOutcome
+from arc.tckdb.config import TCKDBConfig
+
+__all__ = ["TCKDBAdapter", "TCKDBConfig", "UploadOutcome"]