instance_manager: Add comment to clarify that filters are not reverted

Author: leoyvens

core/src/subgraph/instance_manager.rs

@@ -534,6 +534,9 @@ where
                     // Revert the in-memory state:
                     // - Remove hosts for reverted dynamic data sources.
                     // - Clear the entity cache.
+                    //
+                    // Note that we do not currently revert the filters,
+                    // which is not ideal, but also not incorrect.
                     ctx.state.instance.revert_data_sources(subgraph_ptr.number);
                     ctx.state.entity_lfu_cache = LfuCache::new();
                     continue;

tests/integration-tests/data-source-context/abis/Contract.abi

@@ -0,0 +1 @@
+[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint16","name":"x","type":"uint16"}],"name":"Trigger","type":"event"},{"inputs":[{"internalType":"uint16","name":"x","type":"uint16"}],"name":"emitTrigger","outputs":[],"stateMutability":"nonpayable","type":"function"}]