Prep for v1.22.1 release

[alexweininger]

No description provided.

[Copilot]

Pull request overview

Prepares the extension for the v1.22.1 release by promoting the version from an alpha prerelease to a stable release and documenting the release notes in the changelog.

Changes:

• Bump extension version from 1.22.1-alpha.0 to 1.22.1 in package.json.
• Sync package-lock.json version fields to 1.22.1.
• Add 1.22.1 release notes entry to CHANGELOG.md dated 2026-06-11.

Show a summary per file

File	Description
package.json	Updates the published extension version to 1.22.1.
package-lock.json	Aligns lockfile/package version metadata with the release version.
CHANGELOG.md	Adds release notes for 1.22.1 (Fixed + Engineering sections).

Copilot's findings

• Files reviewed: 2/3 changed files
• Comments generated: 0

[nturinski]

@copilot Add this to the changelog since it's now merged into main
#5104

[Copilot]

@copilot Add this to the changelog since it's now merged into main
#5104

Added in the latest commit — included under the Fixed section of the 1.22.1 entry as re-allowing Python 3.14 deployments to Flex Consumption plans now that remote build is supported.