provide Ditto 3.8.10 release notes

Author: thjaeckle

documentation/src/main/resources/_data/sidebars/ditto_sidebar.yml

@@ -23,6 +23,9 @@ entries:
       - title: Release Notes
         output: web
         folderitems:
+          - title: 3.8.10
+            url: /release_notes_3810.html
+            output: web
           - title: 3.8.9
             url: /release_notes_389.html
             output: web

documentation/src/main/resources/pages/ditto/release_notes_3810.md

@@ -0,0 +1,34 @@
+---
+title: Release notes 3.8.10
+tags: [release_notes]
+published: true
+keywords: release notes, announcements, changelog
+summary: "Version 3.8.10 of Eclipse Ditto, released on 15.12.2025"
+permalink: release_notes_3810.html
+---
+
+This is a bugfix release, no new features since [3.8.9](release_notes_389.html) were added.
+
+## Changelog
+
+Compared to the latest release [3.8.9](release_notes_389.html), the following changes and bugfixes were added.
+
+### Bugfixes
+
+This is a complete list of the
+[merged pull requests](https://github.com/eclipse-ditto/ditto/pulls?q=is%3Apr+milestone%3A3.8.10).
+
+#### Fix false positive ERROR logs when using response-required:false and conditions which did not match
+
+PR [#2293](https://github.com/eclipse-ditto/ditto/pull/2293) fixes another ERROR log which falsely was logged as ERROR.  
+This happened for modifying commands of a thing when using `response-required:false` header and providing a condition
+which did not match (e.g. `If-Match: *`).
+
+#### Fix mapping of response payload of HTTP APIs invoked by http-push connections
+
+PR [#2294](https://github.com/eclipse-ditto/ditto/pull/2294) resolves an issue in Ditto managed HTTP connections, mapping 
+the response payload of the called API.  
+Before the fix, all responses were mapped to JSON, e.g. a text payload was mapped to a JSON string `"the text payload"`.  
+And a non-text and non-JSON payload (e.g. binary) was encoded to Base64 and mapped to a JSON string containing the Base64 encoded data.
+
+This is now fixed, e.g. images are now correctly mapped through Ditto, calling an external HTTP API.