Make gRPC Client Deadline B/W GQL and Entity Service Configurable

[suddendust]

Use Case

We want to make gRPC client deadline from GQL -> Entity Service configurable.

Proposal

If you look at https://github.com/hypertrace/hypertrace-graphql/blob/cef8ab9b579df1208d2fc783209bf0416021ce94/hypertrace-graphql-entity-schema/src/main/java/org/hypertrace/graphql/entity/dao/GatewayServiceEntityDao.java#L80, the client deadline is hardcoded to 10s. We want to increase this but since it is not configurable, we will have to make a code change.

[aaron-steinfeld]

+1 - this can be added in the same way the connection details are (although I think it sounds like you're looking for the gateway service timeout, rather than entity service) - accessed via the typed config object, defaulted/read from the application.conf file and overridable in helm values.