docs: add error handling section to version 1

src/docs/version_001/error_handling/copy.md

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+# Error Handling {% #error-handling %}
+
+The Onspring API uses conventional HTTP response codes to indicate the success or failure of an API request. Codes in the `4xx` range indicate an error that failed given the information provided. Codes in the `5xx` range indicate an error within Onspring's servers.
+
+The internet is a big place and requests sent across the network should be treated as if they may fail at any time. We recommend that you implement a retry strategy for requests that fail. This will help to ensure that your application is able to recover from any network issues that may occur.
+
+Some 4xx errors will also include an `Error` object in the response body. This object can contain a message with additional information about the error.
+
+**Note:** The exception to the above is if you receive a `499` status code this indicates that the request has exceeded the 90 second timeout limit of our api gateway. This is not an error with the request itself, but rather a timeout. This is a result of the request taking too long to process. Typically this is due to a large amount of data being requested or a request triggering a lot of processing. If you receive this error, you should consider breaking up your request into smaller requests.
+
+## Error Properties
+
+{% table %}
+
+- Property Name
+- Data Type
+- Description
+
+---
+
+- Message
+- `string`
+- A human-readable message describing the error.
+
+{% table %}
+
+**Note:** The `Message` property is not guaranteed to be present in the response body. The response body may be empty or contain other properties.