Fleet Server / Elastic Agent 9.0.6 and 9.1.3 release notes (#2724) (#2732)

Converts release notes generated in elastic/elastic-agent and
elastic/fleet-server to Markdown and adds them to this repo:

* 9.0.6:
  *  elastic/elastic-agent#9564
  * elastic/fleet-server#5341
* 9.1.3: 
  * elastic/elastic-agent#9565
  * elastic/fleet-server#5342

Co-authored-by: Pierre HILBERT <[email protected]>
Co-authored-by: Visha Angelova <[email protected]>

Author: 3 people

release-notes/fleet-elastic-agent/index.md

@@ -26,6 +26,35 @@ To check for security updates, go to [Security announcements for the Elastic sta
 % ### Fixes [fleet-elastic-agent-next-fixes]
 % *
 
+## 9.1.3 [fleet-elastic-agent-9.1.3-release-notes]
+
+### Features and enhancements [fleet-elastic-agent-9.1.3-features-enhancements]
+
+**Elastic Agent**
+
+* Adjust the timeout for Elastic Defend check command. [#9213](https://github.com/elastic/elastic-agent/pull/9213)
+* Update OTel components to v0.130.0. [#9362](https://github.com/elastic/elastic-agent/pull/9362)
+
+### Fixes [fleet-elastic-agent-9.1.3-fixes]
+
+**Elastic Agent**
+
+* Upgrade Go version to 1.24.6. [#9287](https://github.com/elastic/elastic-agent/pull/9287)
+* On Windows, retry saving the Agent information file to disk. [#9224](https://github.com/elastic/elastic-agent/pull/9224) [#5862](https://github.com/elastic/elastic-agent/issues/5862)
+
+  Saving the Agent information file involves renaming/moving a file to its final destination. However, on Windows, it is sometimes not possible to rename/move a file to its destination file because the destination file is locked by another process (for example, an antivirus software). In such cases, we now retry the save operation on Windows.
+
+* Correct hints annotations parsing to resolve only `${kubernetes.*}` placeholders instead of resolving all `${...}` patterns. [#9307](https://github.com/elastic/elastic-agent/pull/9307)
+* Treat exit code 28 from Endpoint binary as non-fatal. [#9320](https://github.com/elastic/elastic-agent/pull/9320)
+* Fixed jitter backoff strategy reset. [#9342](https://github.com/elastic/elastic-agent/pull/9342) [#8864](https://github.com/elastic/elastic-agent/issues/8864)
+* Fix Docker container failing to start with `no matching vars: ${env.ELASTICSEARCH_API_KEY:}` and similar errors by restoring support for `:` to set default values. [#9451](https://github.com/elastic/elastic-agent/pull/9451) [#9328](https://github.com/elastic/elastic-agent/issues/9328)
+* Fix deb upgrade by stopping `elastic-agent` service before stopping endpoint. [#9462](https://github.com/elastic/elastic-agent/pull/9462)
+
+**Fleet Server**
+
+* Fix 503 handling in enrollment. [#5232](https://github.com/elastic/fleet-server/pull/5232) [#5197](https://github.com/elastic/fleet-server/issues/5197)
+* Remove extra ES search when preparing agent policy. [#5283](https://github.com/elastic/fleet-server/pull/5283)
+
 ## 9.1.2 [fleet-elastic-agent-9.1.2-release-notes]
 
 There are no new features, enhancements, or fixes in this release.
@@ -118,6 +147,34 @@ There are no new features, enhancements, or fixes in this release.
 * Enable dead code elimination. [#4784]({{fleet-server-pull}}4784)
 * Include the base error for JSON decode error responses. [#5069]({{fleet-server-pull}}5069)
 
+## 9.0.6 [fleet-elastic-agent-9.0.6-release-notes]
+
+### Features and enhancements [fleet-elastic-agent-9.0.6-features-enhancements]
+
+**Elastic Agent**
+
+* Adjust the timeout for Elastic Defend check command. [#9213](https://github.com/elastic/elastic-agent/pull/9213)
+
+### Fixes [fleet-elastic-agent-9.0.6-fixes]
+
+**Elastic Agent**
+
+* Upgrade Go version to 1.24.6. [#9287](https://github.com/elastic/elastic-agent/pull/9287)
+* On Windows, retry saving the Agent information file to disk. [#9224](https://github.com/elastic/elastic-agent/pull/9224) [#5862](https://github.com/elastic/elastic-agent/issues/5862)
+
+  Saving the Agent information file involves renaming/moving a file to its final destination. However, on Windows, it is sometimes not possible to rename/move a file to its destination file because the destination file is locked by another process (for example, an antivirus software). In such cases, we now retry the save operation on Windows.
+
+* Correct hints annotations parsing to resolve only `${kubernetes.*}` placeholders instead of resolving all `${...}` patterns. [#9307](https://github.com/elastic/elastic-agent/pull/9307)
+* Treat exit code 28 from Endpoint binary as non-fatal. [#9320](https://github.com/elastic/elastic-agent/pull/9320)
+* Fixed jitter backoff strategy reset. [#9342](https://github.com/elastic/elastic-agent/pull/9342) [#8864](https://github.com/elastic/elastic-agent/issues/8864)
+* Fix Docker container failing to start with `no matching vars: ${env.ELASTICSEARCH_API_KEY:}` and similar errors by restoring support for `:` to set default values. [#9451](https://github.com/elastic/elastic-agent/pull/9451) [#9328](https://github.com/elastic/elastic-agent/issues/9328)
+* Fix deb upgrade by stopping `elastic-agent` service before upgrading. [#9462](https://github.com/elastic/elastic-agent/pull/9462)
+
+**Fleet Server**
+
+* Fix 503 handling in enrollment. [#5232](https://github.com/elastic/fleet-server/pull/5232) [#5197](https://github.com/elastic/fleet-server/issues/5197)
+* Remove extra ES search when preparing agent policy. [#5283](https://github.com/elastic/fleet-server/pull/5283)
+
 ## 9.0.5 [fleet-elastic-agent-9.0.5-release-notes]
 
 ### Fixes [fleet-elastic-agent-9.0.5-fixes]