RDSC-4108: RDI 1.15.0 release notes

[ZdravkoDonev-redis]

No description provided.

[github-actions]

Staging links:
https://redis.io/docs/staging/RDSC-4108-rdi-1-15-0-release-notes/integrate/redis-data-integration/data-pipelines/pipeline-config/
https://redis.io/docs/staging/RDSC-4108-rdi-1-15-0-release-notes/integrate/redis-data-integration/installation/install-vm/
https://redis.io/docs/staging/RDSC-4108-rdi-1-15-0-release-notes/integrate/redis-data-integration/reference/config-yaml-reference/
https://redis.io/docs/staging/RDSC-4108-rdi-1-15-0-release-notes/integrate/redis-data-integration/release-notes/rdi-1-15-0/

[Copilot]

Pull Request Overview

This PR adds the release notes for Redis Data Integration (RDI) version 1.15.0, documenting new features, breaking changes, bug fixes, and improvements released in October 2025. The release introduces significant performance improvements through native JSON merge operations, enhanced high availability features, and better resource management capabilities.

Key changes:

• Documents the introduction of native JSON merge operations with breaking changes in null value handling
• Adds support for sharded Redis databases and enhanced monitoring capabilities
• Updates installation documentation to include custom K3s configuration options

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
content/integrate/redis-data-integration/release-notes/rdi-1-15-0.md	Complete release notes for RDI 1.15.0 with new features, breaking changes, and bug fixes
content/integrate/redis-data-integration/installation/install-vm.md	Added documentation for custom K3s installation parameters

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[Copilot]

Pull Request Overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

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[stoyanr]

lgtm, some minor suggestions

[andy-stark-redis]

Content is OK, but I've fixed a few glitches. Good to go now.