Move Operation, op_to_transform_id, and operation_sequence_id to lib/operations

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/operations.py

@@ -0,0 +1,24 @@
+import hashlib
+from typing import Any, TypedDict
+from sage.all import Graph  # type: ignore[attr-defined]  # pylint: disable=no-name-in-module
+from lib.colored_graphs import ColoredGraphId, VertexColoring
+
+class Operation(TypedDict):
+    """Information about a change made to a (colored) graph"""
+    name: Any
+    meta: Any
+    source_graph: Graph
+    source_canon_id: ColoredGraphId
+    result_graph: Graph
+    result_coloring: VertexColoring
+    result_canon_id: ColoredGraphId
+
+def colored_graph_id_to_string(cid: ColoredGraphId) -> str:
+    return f"{cid['graph_id']} {cid['coloring_id']}"
+
+def operation_to_string(op: Operation) -> str:
+    return f"{colored_graph_id_to_string(op['source_canon_id'])} -> {colored_graph_id_to_string(op['result_canon_id'])}"
+
+def operation_sequence_id(ops: list[Operation]) -> str:
+    joined = "\n".join(operation_to_string(op) for op in ops)
+    return hashlib.sha256(joined.encode()).hexdigest()