Add D1 changelog and release notes for request latency improvements

src/content/changelogs-next/2025-01-07-d1-faster-query.mdx

@@ -0,0 +1,16 @@
+---
+title: 40-60% Faster D1 Worker API Requests
+description: D1's Worker API request latency decreases by 40-60%.
+products:
+  - d1
+date: 2025-01-07T18:00:00Z
+---
+
+[D1](/d1/) lowered end-to-end Worker API request latency by 40-60% by eliminating redundant network round trips for each request.
+
+![D1 Worker API latency](~/assets/images/d1/faster-d1-worker-api.png)
+*p50, p90, and p95 latency aggregated across entire D1 service. These latencies are a reference point and should not be viewed as your exact workload improvement.
+
+This performance improvement benefits all D1 Worker API traffic, especially cross-region requests where network latency is an outsized latency factor. For example, a user in Europe talking to a database in North America. D1 [location hints](/d1/configuration/data-location/#provide-a-location-hint) can be used to influence the geographic location of a database.
+
+For more details on how D1 lowered latency, see product-specific changelog [entry](/d1/platform/changelog/#2025-01-07).

src/content/changelogs/d1.yaml

@@ -16,6 +16,16 @@ entries:
 
       For better insight into your current usage, refer to your [billing metrics](/d1/observability/billing/) for rows read and rows written, which can be found on the [D1 dashboard](https://dash.cloudflare.com/?account=/workers/d1) or GraphQL API.
 
+  - publish_date: "2025-01-07"
+    title: D1's Worker API request latency decreases by 40-60%.
+    description: |-
+
+    [D1](/d1/) lowered end-to-end Worker API request latency by 40-60% by eliminating redundant network round trips for each request.
+
+    For each request to a D1 database, at least two network round trips were eliminated. One round trip was due to a bug that is now fixed. The remaining removed round trips are due to avoiding creating a new TCP connection for each request when reaching out to the datacenter hosting the database.
+
+    The removal of redundant network round trips also apply to D1's [REST API](/api/resources/d1/subresources/database/methods/query/). However, the REST API still depends on Cloudflare's centralized datacenters for authentication, which reduces the relative performance improvement.
+
   - publish_date: "2024-08-23"
     title: D1 alpha databases have stopped accepting SQL queries
     description: |-