Release note: changes to Discovery API endpoints (#4005)

## What are you changing in this pull request and why?

Release note that describes the deprecation of certain endpoints and
query patterns in the dbt Cloud Discovery API.

## Checklist
- [x] Review the [Content style
guide](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/content-style-guide.md)
and [About
versioning](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#adding-a-new-version)
so my content adheres to these guidelines.
- [x] Needs review from PM

Adding new pages (delete if not applicable):
- [x] Add page to `website/sidebars.js`
- [x] Provide a unique filename for the new page

website/docs/docs/dbt-versions/release-notes/05-Aug-2023/deprecation-endpoints-discovery.md

@@ -0,0 +1,126 @@
+---
+title: "Deprecation: Query patterns and endpoints in the dbt Cloud Discovery API"
+description: "August 2023: Learn about the upcoming deprecation of certain endpoints and query patterns in the Discovery API."
+sidebar_position: 6
+sidebar_label: "Deprecation: Certain Dicovery API endpoints and query patterns"
+tags: [Aug-2023, API]
+date: 2023-08-31
+---
+
+dbt Labs has deprecated and will be deprecating certain query patterns and replacing them with new conventions to enhance the performance of the dbt Cloud [Discovery API](/docs/dbt-cloud-apis/discovery-api). 
+
+All these changes will be in effect on _September 7, 2023_. 
+
+We understand that these changes might require adjustments to your existing integration with the Discovery API. Please [contact us](mailto:[email protected]) with any questions. We're here to help you during this transition period.
+
+## Job-based queries
+
+Job-based queries that use the data type `Int` for IDs will be deprecated. They will be marked as deprecated in the [GraphQL explorer](https://metadata.cloud.getdbt.com/graphql). The new convention will be for you to use the data type `BigInt` instead. 
+
+This change will be in effect starting September 7, 2023. 
+
+
+Example of query before deprecation: 
+
+```graphql
+query ($jobId: Int!) {
+  models(jobId: $jobId){
+    uniqueId
+  }
+}
+```
+
+Example of query after deprecation:
+
+```graphql
+query ($jobId: BigInt!) {
+  job(id: $jobId) {
+    models {
+      uniqueId
+    }
+  }
+}
+```
+
+## modelByEnvironment queries 
+
+The `modelByEnvironment` object has been renamed and moved into the `environment` object. This change is in effect and has been since August 15, 2023.
+
+Example of query before deprecation: 
+
+```graphql
+query ($environmentId: Int!, $uniqueId: String) {
+  modelByEnvironment(environmentId: $environmentId, uniqueId: $uniqueId) {
+    uniqueId
+    executionTime
+    executeCompletedAt
+  }
+}
+```
+
+Example of query after deprecation: 
+
+```graphql
+query ($environmentId: BigInt!, $uniqueId: String) {
+  environment(id: $environmentId) {
+    applied {
+      modelHistoricalRuns(uniqueId: $uniqueId) {
+        uniqueId
+        executionTime
+        executeCompletedAt
+      }
+    }
+  }
+}
+```
+
+
+## Environment and account queries
+
+Environment and account queries that use `Int` as a data type for ID has been deprecated. IDs must now be in `BigInt`. This change is in effect and has been since August 15, 2023.
+
+
+Example of query before deprecation: 
+
+```graphql
+query ($environmentId: Int!, $first: Int!) {
+  environment(id: $environmentId) {
+    applied {
+      models(first: $first) {
+        edges {
+          node {
+            uniqueId
+            executionInfo {
+              lastRunId
+            }
+          }
+        }
+      }
+    }
+  }
+}
+```
+
+
+Example of query after deprecation: 
+
+```graphql
+query ($environmentId: BigInt!, $first: Int!) {
+  environment(id: $environmentId) {
+    applied {
+      models(first: $first) {
+        edges {
+          node {
+            uniqueId
+            executionInfo {
+              lastRunId
+            }
+          }
+        }
+      }
+    }
+  }
+}
+```
+
+