Upgrade Tomcat to fix CVE-2025-55752

[qligier]

Summary by Sourcery

Upgrade embedded Tomcat to version 10.1.48 to fix CVE-2025-55752 and document the release in the changelog.

Bug Fixes:

• Bump embedded Tomcat to 10.1.48 to address CVE-2025-55752.

Documentation:

• Add Release 4.0.15 entry to changelog noting Tomcat upgrade for security fix.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR upgrades the embedded Tomcat version from 10.1.44 to 10.1.48 to address CVE-2025-55752 and adds a corresponding entry to the changelog.

File-Level Changes

Change	Details	Files
Bump embedded Tomcat version	Increment tomcat_embed_version from 10.1.44 to 10.1.48	pom.xml
Document the Tomcat upgrade in release notes	Add new release 4.0.15 header Note the Tomcat upgrade for CVE-2025-55752 with advisory link	docs/changelog.md

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[sourcery-ai]

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[Copilot]

Pull Request Overview

This PR upgrades the Tomcat embedded dependency to address a security vulnerability and makes minor improvements to the .gitignore file.

• Upgrades Tomcat embedded version from 10.1.44 to 10.1.48 to address CVE-2025-55752
• Documents the security fix in the changelog for release 4.0.15
• Adds gitignore entry for Copilot IDE data files

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
pom.xml	Updates tomcat_embed_version property from 10.1.44 to 10.1.48
docs/changelog.md	Adds release 4.0.15 entry documenting the Tomcat upgrade for CVE fix
.gitignore	Adds pattern to ignore Copilot IDE data files and adds missing final newline

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