[feat] gva: heads and peers

Cargo.lock

rust-libs/modules/gva/dbs-reader/src/lib.rs

rust-libs/modules/gva/dbs-reader/src/network.rs

rust-libs/modules/gva/gql/Cargo.toml

rust-libs/modules/gva/gql/src/entities.rs

rust-libs/modules/gva/gql/src/entities/network.rs

rust-libs/modules/gva/gql/src/lib.rs

rust-libs/modules/gva/gql/src/queries.rs

rust-libs/modules/gva/gql/src/queries/network.rs