chore(substrate): Bump substrate to v0.0.9 and remove collapsing of image env into actor env

[jmhbh]

Bump substrate to v0.0.9 and fix #2206

[Copilot]

Pull request overview

This PR updates the kagent Substrate integration to align with substrate v0.0.9, including protobuf/API shape changes (e.g., actor identity/version moving under Metadata) and removing the prior workaround that manually injected image runtime ENV into the ActorTemplate env (per issue #2206).

Changes:

• Bump github.com/kagent-dev/substrate replace target to v0.0.9 (and update go.sum accordingly).
• Migrate Substrate client + handlers + tests to the new v0.0.9 API/proto shapes (ObjectRef, ResourceMetadata, updated RPC request/response types).
• Remove the Python runtime image ENV re-injection (pythonRuntimeImageEnv) now that substrate applies image ENV directives.

Reviewed changes

Copilot reviewed 12 out of 13 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
go/go.sum	Updates dependency checksums for substrate v0.0.9.
go/go.mod	Bumps the substrate replace to github.com/kagent-dev/substrate v0.0.9.
go/core/pkg/sandboxbackend/substrate/openclaw.go	Uses metadata-based actor identity/atespace for endpoint display.
go/core/pkg/sandboxbackend/substrate/lifecycle_delete_test.go	Updates cleanup-path fakes to match new ControlClient RPC shapes.
go/core/pkg/sandboxbackend/substrate/config_hash_test.go	Updates actor test fixtures to use ResourceMetadata{Name: ...}.
go/core/pkg/sandboxbackend/substrate/client.go	Migrates substrate client calls to ObjectRef + metadata-based identity and updated RPC signatures.
go/core/pkg/sandboxbackend/substrate/client_test.go	Updates CreateAtespace fake to match new request/return types.
go/core/pkg/sandboxbackend/substrate/agentharness_actor.go	Switches actor identification from ActorId to metadata name.
go/core/pkg/sandboxbackend/substrate/agent_lifecycle.go	Removes Python image ENV injection workaround per substrate v0.0.9 behavior.
go/core/pkg/sandboxbackend/substrate/agent_lifecycle_test.go	Updates tests to reflect image ENV no longer being manually re-supplied.
go/core/pkg/sandboxbackend/substrate/agent_actor.go	Switches actor identification from ActorId to metadata name.
go/core/internal/httpserver/handlers/substrate.go	Updates HTTP API mapping to pull Actor/Worker identity/version from metadata/assignment.
go/core/internal/httpserver/handlers/substrate_test.go	Updates handler test fixtures to the new proto shapes.

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