Context
After migrating core Explorer data fetching from RPCs to The Graph subgraph in #327 (comment), a small number of Explorer endpoints still rely on RPC calls due to missing or incomplete subgraph coverage identified during that work.
Goal
Track the Explorer-side dependency on upstream subgraph changes required to fully remove remaining RPC usage. Once the flagged subgraph improvements are implemented, the Explorer can complete the RPC → subgraph migration, improving performance, reliability, and maintainability.