Add metadata capabilities and AZD_EXT_DEBUG support to extensions

[Copilot]

This PR adds metadata capability and AZD_EXT_DEBUG debugger support to all azd extensions. These enhancements enable better telemetry tracking (via command path resolution) and improved debugging workflows for extension developers.

Changes

For Each Extension

1. Metadata Capability: Added metadata command to expose extension command structure for telemetry (captures full extension command path, see tracing: capture full extension command path using metadata capability #6528)
2. Debugger Support: Added azdext.WaitForDebugger() call to support AZD_EXT_DEBUG=true environment variable for debugging extensions (Add azdext.WaitForDebugger to extensions for improved debugging #6542)

For microsoft.azd.extensions (azd x)

• Add metadata and framework service provider capabilities to azd x init wizard
• Update Go scaffolding with metadata command, azdext.WaitForDebugger(), and ExtensionHost pattern

Testing

• Built and tested all extensions locally
• Verified metadata commands return correct command structure
• Verified AZD_EXT_DEBUG=true prompts for debugger attachment

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add metadata capabilities to azure.ai.agents and azure.ai.finetune extensions</issue_title>
<issue_description>See #6496

We'll need to bump the github.com/azure/azure-dev/cli/azd dependency in go.mod</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add metadata capabilities to extensions #6539

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[JeffreyCA]

@copilot can you make these changes, and in addition add improved debugging as described in #6542?

[Copilot]

@copilot can you make these changes, and in addition add improved debugging as described in #6542?

All changes applied in commit 4664a22:

Version updates:

• azure.coding-agent → 0.6.0
• microsoft.azd.extensions → 0.9.0

WaitForDebugger (#6542) added to:

• azure.ai.agents: init command
• azure.ai.finetune: init, jobs submit, jobs show, jobs list commands
• azure.coding-agent: config command
• microsoft.azd.concurx: up command
• microsoft.azd.extensions: init, release commands

Changelog entries simplified to "Add metadata capability" and "Add azdext.WaitForDebugger support for improved debugging".

[Copilot]

Pull request overview

This PR adds metadata capabilities and debugger support across all Azure Dev CLI extensions. The changes enable better telemetry tracking through command path resolution and improved debugging workflows via the AZD_EXT_DEBUG environment variable.

Changes:

• Added metadata command to all Go-based extensions to expose command structure for telemetry
• Integrated azdext.WaitForDebugger() support throughout extension commands for debugging with AZD_EXT_DEBUG=true
• Updated microsoft.azd.extensions (azd x) scaffolding to include metadata and framework service provider capabilities

Reviewed changes

Copilot reviewed 39 out of 43 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
microsoft.azd.extensions/internal/resources/languages/go/internal/cmd/metadata.go.tmpl	New template for metadata command generation
microsoft.azd.extensions/internal/resources/languages/go/internal/cmd/*.go.tmpl	Added WaitForDebugger calls to command templates
microsoft.azd.extensions/internal/resources/languages/go/internal/cmd/listen.go.tmpl	Refactored to use ExtensionHost pattern
microsoft.azd.extensions/internal/resources/languages/go/go.mod.tmpl	Updated dependencies and Go version
microsoft.azd.extensions/internal/cmd/*.go	Added metadata command and WaitForDebugger to core commands
microsoft.azd.extensions/internal/cmd/init.go	Added metadata and framework service provider to capability wizard
microsoft.azd.extensions/extension.yaml	Added metadata capability declaration
azure.coding-agent/*, azure.ai.finetune/*, azure.ai.agents/*, microsoft.azd.concurx/*, microsoft.azd.demo/*	Applied metadata commands, WaitForDebugger support, and dependency updates across all extensions
*.go.mod, *.go.sum	Updated azure-dev dependency versions and transitive dependencies

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