add support for the albert platform configuration

[jvancoillie]

Q	A
Bug fix?	no
New feature?	yes
Docs?	no
Issues	Fix #836
License	MIT

This PR introduces support for configuring the Albert platform under the ai.platforms section, following the pattern of existing platforms (OpenAI, Mistral, Ollama, etc.).

The underlying Albert integration was already implemented, but the albert platform key was not recognized during configuration parsing.

ai:
  platforms:
    albert:
      api_key: '%env(ALBERT_API_KEY)%'
      base_url: '%env(ALBERT_API_URL)%'

The configuration uses base_url because this is the parameter expected by the Albert platform factory.
Some platforms use host instead, which might cause confusion. If needed, I'm open to aligning naming conventions in a follow-up discussion.

I did not define a default base_url, but we could consider providing the known Albert endpoint (https://albert.api.etalab.gouv.fr/v1) if that aligns with the project’s policy on defaults.

While working on this, I also noticed that the list of Albert models may not be fully aligned with the current API. I can open a separate issue to track that, unless this work is already in progress.

[Copilot]

Pull Request Overview

This PR adds support for the Albert AI platform to the Symfony AI bundle. Albert is an AI platform provided by the French government (etalab.gouv.fr).

Key changes:

• Added Albert platform configuration with required api_key and base_url fields
• Integrated Albert platform factory into the dependency injection container
• Updated test fixtures to include Albert configuration

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/ai-bundle/config/options.php	Added Albert platform configuration schema with api_key, base_url, and http_client options
src/ai-bundle/src/AiBundle.php	Added Albert platform factory registration and service definition
src/ai-bundle/tests/DependencyInjection/AiBundleTest.php	Added Albert platform configuration to test fixtures

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[jvancoillie]

Quick update: I added support for providing a custom ModelCatalog in the factory, so the Albert platform configuration is now consistent with the other platforms.

Also, regarding the model list: I saw that the alignment work was already merged, so that part is resolved (#839).

One open point from the original description: Albert currently uses base_url while some platforms use host. Do we want to standardize on one naming style across platforms, or keep it platform-specific for now?

Related to that: should we provide a default base_url for Albert (e.g. https://albert.api.etalab.gouv.fr/v1), or do we prefer requiring it explicitly in configuration?

[chr-hertel]

See #839 and #840 for other items - i think base_url vs host or default is fine like this

[chr-hertel]

could you please squash the two commits?