[FIX] Vertex AI conditional field bug and update default max_tokens to 4096 (#1688)

* modified vertext_ai.json

* Updated max_tokens to 4096 for all llm adapters

Author: pk-zipstack

unstract/sdk1/src/unstract/sdk1/adapters/llm1/static/anthropic.json

@@ -26,7 +26,7 @@
       "type": "number",
       "minimum": 0,
       "multipleOf": 1,
-      "default": 512,
+      "default": 4096,
       "title": "Maximum Output Tokens",
       "description": "Maximum number of output tokens to limit LLM replies, the maximum possible differs from model to model."
     },

unstract/sdk1/src/unstract/sdk1/adapters/llm1/static/anyscale.json

@@ -39,7 +39,7 @@
       "minimum": 0,
       "multipleOf": 1,
       "title": "Maximum Output Tokens",
-      "default": 256,
+      "default": 4096,
       "description": "Maximum number of output tokens to limit LLM replies, maximum possible varies from model to model."
     },
     "max_retries": {

unstract/sdk1/src/unstract/sdk1/adapters/llm1/static/azure.json

@@ -50,6 +50,7 @@
       "minimum": 0,
       "multipleOf": 1,
       "title": "Maximum Output Tokens",
+      "default": 4096,
       "description": "Maximum number of output tokens to limit LLM replies, leave it empty to use the maximum possible for the selected model."
     },
     "max_retries": {

unstract/sdk1/src/unstract/sdk1/adapters/llm1/static/bedrock.json

@@ -42,7 +42,7 @@
       "type": "number",
       "minimum": 0,
       "multipleOf": 1,
-      "default": 512,
+      "default": 4096,
       "title": "Maximum Output Tokens",
       "description": "Maximum number of output tokens to limit LLM replies, the maximum possible differs from model to model."
     },

unstract/sdk1/src/unstract/sdk1/adapters/llm1/static/mistral.json

@@ -37,7 +37,7 @@
       "type": "number",
       "minimum": 0,
       "multipleOf": 1,
-      "default": 512,
+      "default": 4096,
       "title": "Maximum Output Tokens",
       "description": "Maximum number of output tokens to limit LLM replies, the maximum possible differs from model to model."
     },

unstract/sdk1/src/unstract/sdk1/adapters/llm1/static/openai.json

@@ -43,6 +43,7 @@
       "minimum": 0,
       "multipleOf": 1,
       "title": "Maximum Output Tokens",
+      "default": 4096,
       "description": "Maximum number of output tokens to limit LLM replies, leave it empty to use the maximum possible for the selected model."
     },
     "max_retries": {

unstract/sdk1/src/unstract/sdk1/adapters/llm1/static/vertex_ai.json

@@ -45,15 +45,14 @@
       "minimum": 0,
       "multipleOf": 1,
       "title": "Max output tokens",
-      "default": 2048,
+      "default": 4096,
       "description": "Maximum number of output tokens to generate. This is limited by the maximum supported by the model and will vary from model to model"
     },
     "safety_settings": {
       "type": "object",
       "title": "Safety Settings",
       "description": "Vertex AI's configurable safety filters",
       "properties": {
-        "type": "string",
         "dangerous_content": {
           "type": "string",
           "title": "Dangerous Content",