feat(ui): dagre layered service map — routed edges, level-of-detail, … #217

Job	Run time
Semgrep (SAST)	21s
SBOM (SPDX + CycloneDX)	22s
Gitleaks (secret scan)	8s
OSV-Scanner (SCA)	8s
Trivy (filesystem + container scan)	12s
jscpd (duplication < 3% on touched code)	13s
	1m 24s

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