fix(opencode): surface content-filter finish reason as visible error (#31745)

Co-authored-by: Aiden Cline <aidenpcline@gmail.com>

packages/sdk/openapi.json

@@ -14375,6 +14375,27 @@
         "required": ["name", "data"],
         "additionalProperties": false
       },
+      "ContentFilterError": {
+        "type": "object",
+        "properties": {
+          "name": {
+            "type": "string",
+            "enum": ["ContentFilterError"]
+          },
+          "data": {
+            "type": "object",
+            "properties": {
+              "message": {
+                "type": "string"
+              }
+            },
+            "required": ["message"],
+            "additionalProperties": false
+          }
+        },
+        "required": ["name", "data"],
+        "additionalProperties": false
+      },
       "APIError": {
         "type": "object",
         "properties": {
@@ -14468,6 +14489,9 @@
               {
                 "$ref": "#/components/schemas/ContextOverflowError"
               },
+              {
+                "$ref": "#/components/schemas/ContentFilterError"
+              },
               {
                 "$ref": "#/components/schemas/APIError"
               }
@@ -17399,6 +17423,9 @@
                           {
                             "$ref": "#/components/schemas/ContextOverflowError"
                           },
+                          {
+                            "$ref": "#/components/schemas/ContentFilterError"
+                          },
                           {
                             "$ref": "#/components/schemas/APIError"
                           }
@@ -29058,6 +29085,9 @@
                   {
                     "$ref": "#/components/schemas/ContextOverflowError"
                   },
+                  {
+                    "$ref": "#/components/schemas/ContentFilterError"
+                  },
                   {
                     "$ref": "#/components/schemas/APIError"
                   }