DEX-36 Update license headers

[Krosovok]

No description provided.

[hashicorp-vault-sonar-prod]

DEX-36

[sonar-review-alpha]

Summary

This PR updates copyright headers across 161 files to remove the year range (2009-2025) from license notices, leaving just the copyright holder "SonarSource Sàrl". Additionally, it updates the README copyright line from "Copyright 2016-2025 SonarSource." to "Copyright SonarSource Sàrl." and bumps the parent POM version from 86.0.0.3040 to 87.0.0.3057. These are maintenance changes to align with updated copyright conventions.

What reviewers should know

Scope: This is a bulk license header update affecting all source files in the project.

Key changes:

• Copyright headers: Copyright (C) 2009-2025 SonarSource Sàrl → Copyright (C) SonarSource Sàrl (year range removed)
• README.md: Updated copyright statement in the License section
• pom.xml: Parent version bump (likely required for compatibility with header changes)

Review focus: Verify that all files have the same header format applied consistently. The changes are mechanical (one-line edits per file) and should have no functional impact on the codebase.

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[sonarqube-next]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
0 Dependency risks
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarQube

[sonar-review-alpha]

LGTM! ✅

Clean, mechanical PR — all 161 files receive an identical one-line copyright header update with no logic changes. Nothing to flag.

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