feat: 新增向量嵌入服务支持

新增SiliconFlow向量嵌入服务实现，支持文本向量化功能：
- 新增ITextEmbeddingService接口和SiliconFlowTextEmbeddingService实现
- 新增EmbeddingCreateRequest/Response等向量相关DTO
- 在AiGateWayManager中新增EmbeddingForStatisticsAsync方法
- 在OpenApiService中新增向量生成API接口
- 扩展ModelTypeEnum枚举支持Embedding类型
- 优化ThorChatMessage的Content属性处理逻辑

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application/Services/OpenApiService.cs

@@ -3,6 +3,7 @@ using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.Logging;
 using Volo.Abp.Application.Services;
 using Yi.Framework.AiHub.Application.Contracts.Dtos.OpenAi;
+using Yi.Framework.AiHub.Application.Contracts.Dtos.OpenAi.Embeddings;
 using Yi.Framework.AiHub.Application.Contracts.Dtos.OpenAi.Images;
 using Yi.Framework.AiHub.Domain.Entities.Model;
 using Yi.Framework.AiHub.Domain.Extensions;
@@ -72,6 +73,20 @@ public class OpenApiService : ApplicationService
         await _aiBlacklistManager.VerifiyAiBlacklist(userId);
         await _aiGateWayManager.CreateImageForStatisticsAsync(httpContext, userId, null, input);
     }
+    
+    /// <summary>
+    /// 向量生成
+    /// </summary>
+    /// <param name="input"></param>
+    /// <param name="cancellationToken"></param>
+    [HttpPost("openApi/v1/embeddings")]
+    public async Task EmbeddingAsync([FromBody] ThorEmbeddingInput input, CancellationToken cancellationToken)
+    {
+        var httpContext = this._httpContextAccessor.HttpContext;
+        var userId = await _tokenManager.GetUserIdAsync(GetTokenByHttpContext(httpContext));
+        await _aiBlacklistManager.VerifiyAiBlacklist(userId);
+        await _aiGateWayManager.EmbeddingForStatisticsAsync(httpContext, userId, null, input);
+    }
 
 
     /// <summary>