feat: add ownership tagging

[intel352]

Summary

• Add IaCProviderOwnership support using the Azure ARM workflow-owner tag
• Wire ownership through the typed IaC gRPC server and root/embedded manifests
• Bump workflow dependency and minEngineVersion for the ownership contract

Verification

• GOWORK=off go test ./internal -run 'Test.*Owner|TestOwnershipProviderCompileGuard|TestAzureIaCServer_RegistersOwnership|TestPluginManifestAdvertisesOwnership|TestIaCServer_CompileTimeGuards' -count=1
• GOWORK=off go test ./... -count=1
• GOWORK=off go vet ./...
• git diff --check

Refs GoCodeAlone/workflow#779

[Copilot]

Pull request overview

Adds the new typed IaC ownership contract to the Azure workflow plugin by mapping ownership to the Azure ARM workflow-owner tag, and updates manifests/dependencies to the engine version that supports this service.

Changes:

• Implemented IaCProviderOwnership (Get/Set/List) in the typed gRPC IaC server and in AzureProvider, backed by Azure ARM tags and resource listing.
• Updated both plugin manifests to advertise IaCProviderOwnership and raised minEngineVersion to 0.69.1.
• Bumped github.com/GoCodeAlone/workflow dependency and added Azure armresources dependency; added/extended internal tests for registration and manifest conformance.

Reviewed changes

Copilot reviewed 11 out of 12 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
internal/ownership.go	Implements ownership operations using ARM tags/resources clients and maps ARM resource types to workflow resource types.
internal/provider.go	Wires Azure ARM TagsClient/Resources Client creation into provider initialization and cleans them up on close.
internal/iacserver.go	Exposes ownership RPCs via typed IaC gRPC server and embeds the unimplemented ownership server for forward-compat.
internal/ownership_test.go	Adds unit tests for Set/Get/List ownership behavior using fakes.
internal/region_lister_test.go	Adds service registration + manifest advertisement tests for ownership (and checks both manifests).
internal/iacserver_test.go	Extends compile-time guard test to include IaCProviderOwnershipServer.
internal/iacserver_mapper_test.go	Updates minEngineVersion expectation to 0.69.1.
plugin.json	Raises minEngineVersion and advertises the ownership IaC service.
cmd/workflow-plugin-azure/plugin.json	Mirrors root manifest changes (min engine + ownership service).
go.mod / go.sum	Bumps workflow dependency and adds Azure armresources module (plus transitive sum updates).
CHANGELOG.md	Documents the new ownership support and engine version requirement.

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