fix: restore missing closing paren in trace.py SealRecord.from_dict()

Previous edit accidentally removed the closing ) from cls(...) call in
from_dict classmethod, causing a SyntaxError. Added back.

Co-Authored-By: Oz <oz-agent@warp.dev>

Author: tbitcs

src/specsmith/trace.py

@@ -111,6 +111,7 @@ def from_dict(cls, d: dict[str, object]) -> SealRecord:
             timestamp=str(d["timestamp"]),
             author=str(d.get("author", "specsmith")),
             artifact_ids=_parse_ids(d.get("artifact_ids")),
+        )
 
 
 def _parse_ids(raw: object) -> list[str]: