deprecate Context() methods

Author: joao-r-reis

session.go

@@ -1073,6 +1073,8 @@ func (q *Query) CustomPayload(customPayload map[string][]byte) *Query {
 	return q
 }
 
+// Deprecated: Context retrieval is deprecated. Pass context directly to execution methods
+// like ExecContext or IterContext instead.
 func (q *Query) Context() context.Context {
 	if q.context == nil {
 		return context.Background()
@@ -1888,6 +1890,8 @@ func (b *Batch) SetConsistency(c Consistency) {
 	b.Cons = c
 }
 
+// Deprecated: Context retrieval is deprecated. Pass context directly to execution methods
+// like ExecContext or IterContext instead.
 func (b *Batch) Context() context.Context {
 	if b.context == nil {
 		return context.Background()