feat(router): Hive Console Usage Reporting

[ardatan]

Hive Console Client integration
Ref ROUTER-102
Blocked by graphql-hive/console#7143

Documentation -> graphql-hive/console#7171

TODOs:

• Release hive-console-sdk and add it to Cargo.toml here
• Update documentation and env overrides after feat(config): configuration override using env vars, enable/disable graphiql via config #519 lands.

[gemini-code-assist]

Summary of Changes

Hello @ardatan, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a significant new feature: the ability for the GraphQL router to report detailed usage metrics to the GraphQL Hive Console. This integration provides valuable insights into how the router is being used, including operation names, execution times, and error rates. The reporting mechanism is highly configurable, allowing users to control aspects like sampling rates, excluded operations, and reporting intervals, ensuring efficient and relevant data collection. This enhancement is crucial for monitoring and optimizing GraphQL API performance and adoption.

Highlights

• Hive Console Usage Reporting Integration: The router now integrates with the hive-console-client to report GraphQL operation usage data, providing insights into router activity.
• Configurable Usage Settings: A new UsageConfig struct has been introduced, allowing detailed configuration of reporting parameters such as API token, endpoint, sample rate, excluded operations, client headers, buffer size, and various timeouts.
• Dynamic Usage Agent Initialization and Background Task: A UsageAgent is initialized based on the provided UsageConfig and registered as a background task, ensuring that usage reports are periodically flushed to the Hive Console.
• GraphQL Pipeline Integration: The GraphQL execution pipeline has been modified to capture operation details, execution duration, and error counts, which are then conditionally sent to the UsageAgent for reporting.
• Dependency Updates and Forked Parser: The project's dependencies have been updated, notably replacing the graphql-parser crate with graphql-parser-hive-fork across Cargo.lock and Cargo.toml files, and adding new crates like md5 and webpki-roots.
• Error Counting in Execution Output: The PlanExecutionOutput now includes an error_count field, which tracks the number of errors encountered during query plan execution, providing crucial data for usage reporting.

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[gemini-code-assist]

Code Review

This pull request introduces Hive Console Client integration for usage reporting in the Hive Router. It includes changes to Cargo.lock and Cargo.toml files to add the new dependency, modifications to bin/router/src/lib.rs and bin/router/src/pipeline/mod.rs to implement the usage reporting logic, and a new file bin/router/src/pipeline/usage.rs for sending usage reports. The shared state is also updated to include the usage agent. I have provided review comments to address potential issues related to error handling and code clarity.