Fix duplicate agent registration; add preview nudge; bump to GA 1.1

[sellakumaran]

• setup all --agent-name: merge AgentRegistrationId from a365.generated.config.json on bootstrap re-runs so the stored ID is used for idempotency, preventing duplicate POST to copilot/agentRegistrations when the same agent is set up more than once
• setup all: skip registration with a warning when AgenticAppId is empty, instead of silently posting an invalid request; directs user to retry with --agent-registration-only
• Version check: add SelectLatestVersions for channel-aware filtering — stable users see stable as primary update target; informational preview nudge shown when a newer preview exists above the latest GA, without triggering the update-required banner
• Bump version.json from 1.1-preview to 1.1 for GA release (drop preview)

Here's what the output looks like with the corrected nudge logic:

Case A — New stable release available

A newer version is available with bug fixes and improvements.
Current: 1.1.12
Latest: 1.2.0

What's new: https://github.com/microsoft/Agent365-devTools/releases
To update, run: dotnet tool update -g Microsoft.Agents.A365.DevTools.Cli
(yellow — LogWarning)

Case B — On latest stable, newer preview with a higher base version

e.g. current = 1.1.0, NuGet has 1.1.0 + 1.2.0-preview.1:

A preview release is also available: 1.2.0-preview.1
To try it: dotnet tool update -g Microsoft.Agents.A365.DevTools.Cli --prerelease
(default/white — LogInformation)

Case B — same-base preview, no nudge (the fix in the staged diff)

e.g. current = 1.1.0, NuGet has 1.1.0 + 1.1.0-preview.50:

(no output)

[github-actions]

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Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

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[Copilot]

Pull request overview

This PR improves a365 setup all idempotency for agent registration, enhances the CLI version-check experience with channel-aware update targeting plus an informational preview nudge, and promotes the CLI from 1.1-preview to 1.1.0 GA.

Changes:

• Prevent duplicate agent registration by reusing a previously stored AgentRegistrationId during bootstrap re-runs (--agent-name) and by skipping registration when AgenticAppId is missing (with a warning and retry guidance).
• Add channel-aware version selection so stable users target the latest stable release, while optionally seeing a non-blocking “newer preview available” notice.
• Bump version.json to 1.1.0 and document the changes in CHANGELOG.md.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/version.json	Bumps the CLI version to 1.1.0 (GA).
src/Microsoft.Agents.A365.DevTools.Cli/Services/VersionCheckService.cs	Returns both primary latest + optional newer preview from NuGet and caches both.
src/Microsoft.Agents.A365.DevTools.Cli/Services/Internal/VersionCheckHelper.cs	Adds SelectLatestVersions to apply channel-aware filtering and compute preview nudge.
src/Microsoft.Agents.A365.DevTools.Cli/Models/VersionCheckModels.cs	Extends version check result/cache models to carry NewerPreviewVersion.
src/Microsoft.Agents.A365.DevTools.Cli/Program.cs	Prints an informational preview-available message when appropriate.
src/Tests/Microsoft.Agents.A365.DevTools.Cli.Tests/Services/VersionCheckServiceTests.cs	Adds unit tests for channel-aware version selection.
src/Microsoft.Agents.A365.DevTools.Cli/Commands/SetupSubcommands/AllSubcommand.cs	In bootstrap mode, merges AgentRegistrationId from generated config to support idempotency.
src/Microsoft.Agents.A365.DevTools.Cli/Commands/SetupSubcommands/NonDwBlueprintSetupOrchestrator.cs	Skips agent registration with a warning when AgenticAppId is missing.
CHANGELOG.md	Documents the new version-check behavior and setup fixes.