[Platform] Embedding models missing Capability::EMBEDDINGS in ModelCatalog

[RamyHakam]

Description

Embedding models in multiple bridge ModelCatalog classes are missing the Capability::EMBEDDINGS capability in their capabilities array.
This causes $model->supports(Capability::EMBEDDINGS) to incorrectly return false for embedding models.

---

Expected Behavior

When checking if an embedding model supports the EMBEDDINGS capability:

use Symfony\AI\Platform\Bridge\OpenAi\ModelCatalog;
use Symfony\AI\Platform\Capability;

$catalog = new ModelCatalog();
$model = $catalog->getModel('text-embedding-3-large');

$model->supports(Capability::EMBEDDINGS); // Expected: true

Actual Behavior

$model->supports(Capability::EMBEDDINGS); // Actual: false

Root Cause

The Capability::EMBEDDINGS enum exists in src/platform/src/Capability.php but is not included in the capabilities array for embedding models in multiple ModelCatalog implementations.

Example from src/platform/src/Bridge/OpenAi/ModelCatalog.php:

'text-embedding-3-large' => [
    'class' => Embeddings::class,
    'capabilities' => [Capability::INPUT_TEXT], // Missing Capability::EMBEDDINGS
],

Affected Bridges

Bridge	Models Affected
OpenAI	text-embedding-ada-002, text-embedding-3-large, text-embedding-3-small
Gemini	gemini-embedding-exp-03-07, text-embedding-004, embedding-001
Mistral	mistral-embed
VertexAI	gemini-embedding-001, text-embedding-005, text-multilingual-embedding-002
Albert	openweight-embeddings
DockerModelRunner	ai/nomic-embed-text-v1.5, ai/mxbai-embed-large, ai/embeddinggemma, ai/granite-embedding-multilingual
Scaleway	bge-multilingual-gemma2
AiMlApi	16 embedding models
Voyage	11 models (entire catalog)

Note: OpenRouter and LmStudio bridges already correctly include Capability::EMBEDDINGS.

Proposed Fix

Add Capability::EMBEDDINGS to the capabilities array for all embedding models.

Example:

'text-embedding-3-large' => [
    'class' => Embeddings::class,
-   'capabilities' => [Capability::INPUT_TEXT],
+   'capabilities' => [Capability::INPUT_TEXT, Capability::EMBEDDINGS],
],