graphics/dcmtk: Update 3.6.9 => 3.7.0, fix 5 CVEs
Security:
- https://nvd.nist.gov/vuln/detail/CVE-2025-2357
- https://nvd.nist.gov/vuln/detail/CVE-2025-9732
- https://nvd.nist.gov/vuln/detail/CVE-2025-25472
- https://nvd.nist.gov/vuln/detail/CVE-2025-25474
- https://nvd.nist.gov/vuln/detail/CVE-2025-25475
Changelogs:
- Use dynamic SOVERSION
- Pet portclippy(1) and portfmt(1)
- Version-bump dependent ports
Approved by: yuri@ (maintainer, Mentor)
MFH: 2026Q1
Differential Revision: https://reviews.freebsd.org/D54557