fix: regenerate API docs for ChatErrorKind (#24989)

Follow-up to #24955 (`refactor: move chat error kinds into codersdk`),
which moved `ChatErrorKind` into `codersdk` but did not refresh the
generated apidoc artifacts. As a result, `make gen` was producing a
dirty tree on `main`.

This PR is the output of running `make gen -B` on a clean checkout of
`main`. Only generated files are touched:

- `coderd/apidoc/docs.go`
- `coderd/apidoc/swagger.json`
- `docs/reference/api/chats.md`
- `docs/reference/api/schemas.md`

The diff adds the `codersdk.ChatErrorKind` schema and replaces the
previously-untyped `kind: string` fields on `codersdk.ChatError` and
`codersdk.ChatRetryEvent` with references to the new enum.

coderd/apidoc/docs.go

@@ -15679,7 +15679,11 @@ const docTemplate = `{
                 },
                 "kind": {
                     "description": "Kind classifies the error for consistent client rendering.",
-                    "type": "string"
+                    "allOf": [
+                        {
+                            "$ref": "#/definitions/codersdk.ChatErrorKind"
+                        }
+                    ]
                 },
                 "message": {
                     "description": "Message is the normalized, user-facing error message.",
@@ -15699,6 +15703,29 @@ const docTemplate = `{
                 }
             }
         },
+        "codersdk.ChatErrorKind": {
+            "type": "string",
+            "enum": [
+                "generic",
+                "overloaded",
+                "rate_limit",
+                "timeout",
+                "startup_timeout",
+                "auth",
+                "config",
+                "usage_limit"
+            ],
+            "x-enum-varnames": [
+                "ChatErrorKindGeneric",
+                "ChatErrorKindOverloaded",
+                "ChatErrorKindRateLimit",
+                "ChatErrorKindTimeout",
+                "ChatErrorKindStartupTimeout",
+                "ChatErrorKindAuth",
+                "ChatErrorKindConfig",
+                "ChatErrorKindUsageLimit"
+            ]
+        },
         "codersdk.ChatFileMetadata": {
             "type": "object",
             "properties": {
@@ -16266,7 +16293,11 @@ const docTemplate = `{
                 },
                 "kind": {
                     "description": "Kind classifies the retry reason for consistent client rendering.",
-                    "type": "string"
+                    "allOf": [
+                        {
+                            "$ref": "#/definitions/codersdk.ChatErrorKind"
+                        }
+                    ]
                 },
                 "provider": {
                     "description": "Provider identifies the upstream model provider when known.",

coderd/apidoc/swagger.json

@@ -14108,7 +14108,11 @@
 				},
 				"kind": {
 					"description": "Kind classifies the error for consistent client rendering.",
-					"type": "string"
+					"allOf": [
+						{
+							"$ref": "#/definitions/codersdk.ChatErrorKind"
+						}
+					]
 				},
 				"message": {
 					"description": "Message is the normalized, user-facing error message.",
@@ -14128,6 +14132,29 @@
 				}
 			}
 		},
+		"codersdk.ChatErrorKind": {
+			"type": "string",
+			"enum": [
+				"generic",
+				"overloaded",
+				"rate_limit",
+				"timeout",
+				"startup_timeout",
+				"auth",
+				"config",
+				"usage_limit"
+			],
+			"x-enum-varnames": [
+				"ChatErrorKindGeneric",
+				"ChatErrorKindOverloaded",
+				"ChatErrorKindRateLimit",
+				"ChatErrorKindTimeout",
+				"ChatErrorKindStartupTimeout",
+				"ChatErrorKindAuth",
+				"ChatErrorKindConfig",
+				"ChatErrorKindUsageLimit"
+			]
+		},
 		"codersdk.ChatFileMetadata": {
 			"type": "object",
 			"properties": {
@@ -14678,7 +14705,11 @@
 				},
 				"kind": {
 					"description": "Kind classifies the retry reason for consistent client rendering.",
-					"type": "string"
+					"allOf": [
+						{
+							"$ref": "#/definitions/codersdk.ChatErrorKind"
+						}
+					]
 				},
 				"provider": {
 					"description": "Provider identifies the upstream model provider when known.",