feat(openapi): add Langfuse credential support and new voice IDs (#39)

This commit adds support for Langfuse credentials, including the required fields (`provider`, `publicKey`, `apiKey`, `apiUrl`) and the unique identifiers (`id` and `orgId`). It also introduces new voice IDs: `ash`, `ballad`, `coral`, `sage`, and `verse`, which are exclusive to the `gpt-4o-realtime-preview-2024-10-01` model.

Co-authored-by: fern-api[bot] <115122769+fern-api[bot]@users.noreply.github.com>

Author: fern-api[bot]

fern/apis/api/openapi.json

@@ -6379,14 +6379,19 @@
             ]
           },
           "voiceId": {
-            "description": "This is the provider-specific ID that will be used.",
+            "description": "This is the provider-specific ID that will be used.\nPlease note that ash, ballad, coral, sage, and verse may only be used with the `gpt-4o-realtime-preview-2024-10-01` model.",
             "enum": [
               "alloy",
               "echo",
               "fable",
               "onyx",
               "nova",
-              "shimmer"
+              "shimmer",
+              "ash",
+              "ballad",
+              "coral",
+              "sage",
+              "verse"
             ],
             "oneOf": [
               {
@@ -14054,6 +14059,57 @@
           "updatedAt"
         ]
       },
+      "LangfuseCredential": {
+        "type": "object",
+        "properties": {
+          "provider": {
+            "type": "string",
+            "enum": [
+              "langfuse"
+            ]
+          },
+          "publicKey": {
+            "type": "string",
+            "description": "The public key for Langfuse project. Eg: pk-lf-..."
+          },
+          "apiKey": {
+            "type": "string",
+            "description": "The secret key for Langfuse project. Eg: sk-lf-... .This is not returned in the API."
+          },
+          "apiUrl": {
+            "type": "string",
+            "description": "The host URL for Langfuse project. Eg: https://cloud.langfuse.com"
+          },
+          "id": {
+            "type": "string",
+            "description": "This is the unique identifier for the credential."
+          },
+          "orgId": {
+            "type": "string",
+            "description": "This is the unique identifier for the org that this credential belongs to."
+          },
+          "createdAt": {
+            "format": "date-time",
+            "type": "string",
+            "description": "This is the ISO 8601 date-time string of when the credential was created."
+          },
+          "updatedAt": {
+            "format": "date-time",
+            "type": "string",
+            "description": "This is the ISO 8601 date-time string of when the assistant was last updated."
+          }
+        },
+        "required": [
+          "provider",
+          "publicKey",
+          "apiKey",
+          "apiUrl",
+          "id",
+          "orgId",
+          "createdAt",
+          "updatedAt"
+        ]
+      },
       "LmntCredential": {
         "type": "object",
         "properties": {
@@ -15090,6 +15146,35 @@
           "apiKey"
         ]
       },
+      "CreateLangfuseCredentialDTO": {
+        "type": "object",
+        "properties": {
+          "provider": {
+            "type": "string",
+            "enum": [
+              "langfuse"
+            ]
+          },
+          "publicKey": {
+            "type": "string",
+            "description": "The public key for Langfuse project. Eg: pk-lf-..."
+          },
+          "apiKey": {
+            "type": "string",
+            "description": "The secret key for Langfuse project. Eg: sk-lf-... .This is not returned in the API."
+          },
+          "apiUrl": {
+            "type": "string",
+            "description": "The host URL for Langfuse project. Eg: https://cloud.langfuse.com"
+          }
+        },
+        "required": [
+          "provider",
+          "publicKey",
+          "apiKey",
+          "apiUrl"
+        ]
+      },
       "CreateLmntCredentialDTO": {
         "type": "object",
         "properties": {
@@ -15784,6 +15869,35 @@
           "apiKey"
         ]
       },
+      "UpdateLangfuseCredentialDTO": {
+        "type": "object",
+        "properties": {
+          "provider": {
+            "type": "string",
+            "enum": [
+              "langfuse"
+            ]
+          },
+          "publicKey": {
+            "type": "string",
+            "description": "The public key for Langfuse project. Eg: pk-lf-..."
+          },
+          "apiKey": {
+            "type": "string",
+            "description": "The secret key for Langfuse project. Eg: sk-lf-... .This is not returned in the API."
+          },
+          "apiUrl": {
+            "type": "string",
+            "description": "The host URL for Langfuse project. Eg: https://cloud.langfuse.com"
+          }
+        },
+        "required": [
+          "provider",
+          "publicKey",
+          "apiKey",
+          "apiUrl"
+        ]
+      },
       "UpdateLmntCredentialDTO": {
         "type": "object",
         "properties": {