graphdb: pass context to PruneGraphNodes

diff --git a/graph/builder.go b/graph/builder.go
index 154a00e..8e2aba1 100644
--- a/graph/builder.go
+++ b/graph/builder.go
@@ -268,7 +268,7 @@ func (b *Builder) Start() error {
 		// Finally, before we proceed, we'll prune any unconnected nodes
 		// from the graph in order to ensure we maintain a tight graph
 		// of "useful" nodes.
-		err = b.cfg.Graph.PruneGraphNodes()
+		err = b.cfg.Graph.PruneGraphNodes(context.TODO())
 		if err != nil &&
 			!errors.Is(err, graphdb.ErrGraphNodesNotFound) {
 
@@ -638,7 +638,7 @@ func (b *Builder) pruneZombieChans() error {
 
 	// With the channels pruned, we'll also attempt to prune any nodes that
 	// were a part of them.
-	err = b.cfg.Graph.PruneGraphNodes()
+	err = b.cfg.Graph.PruneGraphNodes(context.TODO())
 	if err != nil && !errors.Is(err, graphdb.ErrGraphNodesNotFound) {
 		return fmt.Errorf("unable to prune graph nodes: %w", err)
 	}
diff --git a/graph/db/graph.go b/graph/db/graph.go
index bc3d8ee..8ad85aa 100644
--- a/graph/db/graph.go
+++ b/graph/db/graph.go
@@ -494,8 +494,8 @@ func (c *ChannelGraph) PruneGraph(spentOutputs []*wire.OutPoint,
 // any nodes from the channel graph that are currently unconnected. This ensure
 // that we only maintain a graph of reachable nodes. In the event that a pruned
 // node gains more channels, it will be re-added back to the graph.
-func (c *ChannelGraph) PruneGraphNodes() error {
-	nodes, err := c.db.PruneGraphNodes()
+func (c *ChannelGraph) PruneGraphNodes(ctx context.Context) error {
+	nodes, err := c.db.PruneGraphNodes(ctx)
 	if err != nil {
 		return err
 	}
diff --git a/graph/db/graph_test.go b/graph/db/graph_test.go
index ff06f50..cd9f7d7 100644
--- a/graph/db/graph_test.go
+++ b/graph/db/graph_test.go
@@ -4044,7 +4044,7 @@ func TestPruneGraphNodes(t *testing.T) {
 	require.NoError(t, graph.UpdateEdgePolicy(ctx, edge1))
 
 	// We'll now initiate a around of graph pruning.
-	require.NoError(t, graph.PruneGraphNodes())
+	require.NoError(t, graph.PruneGraphNodes(ctx))
 
 	// At this point, there should be 3 nodes left in the graph still: the
 	// source node (which can't be pruned), and node 1+2. Nodes 1 and two
diff --git a/graph/db/interfaces.go b/graph/db/interfaces.go
index edd93a5..95651fa 100644
--- a/graph/db/interfaces.go
+++ b/graph/db/interfaces.go
@@ -390,7 +390,7 @@ type Store interface { //nolint:interfacebloat
 	// unconnected. This ensures that we only maintain a graph of reachable
 	// nodes. In the event that a pruned node gains more channels, it will
 	// be re-added back to the graph.
-	PruneGraphNodes() ([]route.Vertex, error)
+	PruneGraphNodes(ctx context.Context) ([]route.Vertex, error)
 
 	// PruneGraph prunes newly closed channels from the channel graph in
 	// response to a new block being solved on the network. Any transactions
diff --git a/graph/db/kv_store.go b/graph/db/kv_store.go
index 2627e1d..38920ca 100644
--- a/graph/db/kv_store.go
+++ b/graph/db/kv_store.go
@@ -1620,7 +1620,7 @@ func (c *KVStore) PruneGraph(spentOutputs []*wire.OutPoint,
 // any nodes from the channel graph that are currently unconnected. This ensure
 // that we only maintain a graph of reachable nodes. In the event that a pruned
 // node gains more channels, it will be re-added back to the graph.
-func (c *KVStore) PruneGraphNodes() ([]route.Vertex, error) {
+func (c *KVStore) PruneGraphNodes(_ context.Context) ([]route.Vertex, error) {
 	var prunedNodes []route.Vertex
 	err := kvdb.Update(c.db, func(tx kvdb.RwTx) error {
 		nodes := tx.ReadWriteBucket(nodeBucket)
diff --git a/graph/db/sql_store.go b/graph/db/sql_store.go
index 6503dc2..acc1da9 100644
--- a/graph/db/sql_store.go
+++ b/graph/db/sql_store.go
@@ -2802,8 +2802,8 @@ func (s *SQLStore) forEachChanInSCIDList(ctx context.Context, db SQLQueries,
 // source nodes.
 //
 // NOTE: part of the Store interface.
-func (s *SQLStore) PruneGraphNodes() ([]route.Vertex, error) {
-	var ctx = context.TODO()
+func (s *SQLStore) PruneGraphNodes(ctx context.Context) (
+	[]route.Vertex, error) {
 
 	var prunedNodes []route.Vertex
 	err := s.db.ExecTx(ctx, sqldb.WriteTxOpt(), func(db SQLQueries) error {