chore(deps): bump aws.sdk.version from 2.41.14 to 2.49.6 in /backend

Bumps `aws.sdk.version` from 2.41.14 to 2.49.6.

Updates `software.amazon.awssdk:s3` from 2.41.14 to 2.49.6

Updates `software.amazon.awssdk:cloudwatchlogs` from 2.41.14 to 2.49.6

Updates `software.amazon.awssdk:apache-client` from 2.41.14 to 2.49.6

---
updated-dependencies:
- dependency-name: software.amazon.awssdk:s3
  dependency-version: 2.49.6
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: software.amazon.awssdk:cloudwatchlogs
  dependency-version: 2.49.6
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: software.amazon.awssdk:apache-client
  dependency-version: 2.49.6
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

backend/pom.xml

@@ -24,7 +24,7 @@
         <maven.compiler.target>25</maven.compiler.target>
         <maven.compiler.release>25</maven.compiler.release>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <aws.sdk.version>2.41.14</aws.sdk.version>
+        <aws.sdk.version>2.49.6</aws.sdk.version>
         <spring-ai.version>2.0.0</spring-ai.version>
     </properties>