add MPC_HYDRATION_RPC_WS_URL and MPC_HYDRATION_SIGNER_URI to tf

[ppca]

No description provided.

[Copilot]

Pull request overview

This PR extends the infra/partner-mainnet Terraform configuration to pass Hydration connection/configuration values into the deployed container via new env vars sourced from GCP Secret Manager.

Changes:

• Extend node_configs schema to include Hydration RPC WS URL and signer URI secret IDs.
• Add example tfvars values for the new Hydration secrets.
• Add Secret Manager lookups and wire MPC_HYDRATION_RPC_WS_URL / MPC_HYDRATION_SIGNER_URI into the container environment.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
infra/partner-mainnet/variables.tf	Adds Hydration-related secret ID fields to the node_configs object schema.
infra/partner-mainnet/terraform-mainnet-example.tfvars	Updates the sample configuration to include the new Hydration secret IDs.
infra/partner-mainnet/resources.tf	Adds Secret Manager data sources for the Hydration secrets.
infra/partner-mainnet/main.tf	Exposes Hydration secrets to the container as MPC_HYDRATION_* env vars.

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[auto-mausx]

Before this goes to main, I want to add a release to https://github.com/sig-net/mpc-infrastructure, but we can merge this into develop.