feature: Promote gRPC Commit to v1 stable

[frhuelsz]

Promote gRPC Commit to v1 stable

[Copilot]

Pull request overview

This PR promotes the gRPC Commit operation from the v1preview API surface to the stable trident.v1 API, updating server wiring and client/proto definitions accordingly.

Changes:

• Move CommitService/Commit RPC and CommitRequest message from proto/trident/v1preview into a new stable proto/trident/v1/commit_service.proto.
• Register the stable CommitServiceServer in the gRPC server and implement the stable CommitService trait on TridentServer.
• Adjust server module gating so required shared helpers (e.g., datastore helpers) compile in non-preview builds, and update the Rust gRPC client imports for v1 Commit.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
proto/trident/v1preview/commit_service.proto	Removes preview Commit RPC and CommitRequest message, leaving only CheckRoot.
proto/trident/v1/commit_service.proto	Adds new stable v1 CommitService with Commit RPC and CommitRequest.
crates/trident/src/server/tridentserver/services/mod.rs	Makes commit service module always compiled (not preview-gated).
crates/trident/src/server/tridentserver/services/commit.rs	Implements stable v1 CommitService::commit; keeps preview CheckRoot implementation behind feature flag.
crates/trident/src/server/tridentserver/mod.rs	Makes datastore module always available (not preview-gated).
crates/trident/src/server/tridentserver/datastore.rs	Keeps stored_image_hash available generally; moves preview-only state mapping into a preview-gated submodule and re-export.
crates/trident/src/server/mod.rs	Registers stable CommitServiceServer unconditionally; aliases preview server type under feature flag.
crates/trident/src/grpc_client/tridentclient.rs	Switches commit client/request types to v1 stable; retains preview-only clients for other preview services.