Support profile-based changelog bundle --release-date option

[lcawl]

Background

The changelog bundle command currently generates release-date info in the bundle (as long as the release_dates configuration setting is not set to false).
When you're using profiles to generate bundles in a repeated fashion, it uses the "current" date, which is problematic for cases where we need to re-generate bundles after the official release date.
The current work-around is to manually edit the date field in the bundle.

Goal

Allow --release-date in profile-based changelog bundle commands.
Keep --no-release-date unsupported in profile-based commands (YAML release_dates: false remains the config path).

Precedence (document + test)

Input	Result
--release-date 2026-06-23	Writes that date
No CLI date, release_dates: false	No release-date in bundle
No CLI date, release_dates: true (default)	Auto UTC today if bundle has no existing date

Code

ChangelogCommand.cs

• --release-date is allowed in profile-based commands; --no-release-date remains forbidden.
• Updated <remarks> to document [--release-date YYYY-MM-DD] alongside --plan, plus precedence (config suppresses auto-population; CLI override wins).
• Updated releaseDate param summary to mark it as supported in profile mode.

docs/cli-schema.json

• Updated synced notes and release-date parameter summary with the XML doc changes

BundleChangelogsTests.cs

Three new profile-mode service tests:

1. BundleChangelogs_WithProfile_ExplicitReleaseDate_WritesDate — profile + explicit date writes 2026-06-23
2. BundleChangelogs_WithProfile_ReleaseDatesFalseAndExplicitReleaseDate_WritesDate — release_dates: false + CLI date still writes the date
3. BundleChangelogs_WithProfile_ReleaseDatesFalse_SuppressesReleaseDate — release_dates: false with no CLI date omits release-date

No changes to ChangelogBundlingService (already honours input.ReleaseDate) or docs/syntax/changelog.md.

Generative AI disclosure

1. Did you use a generative AI (GenAI) tool to assist in creating this contribution?

• Yes
• No

2. If you answered "Yes" to the previous question, please specify the tool(s) and model(s) used (e.g., Google Gemini, OpenAI ChatGPT-4, etc.).

Tool(s) and model(s) used: composer-2.5-fast