fix(detector/jvm): scala + kotlin discriminator guards #156

Job	Run time
Gitleaks (secret scan)	16s
SBOM (SPDX + CycloneDX)	18s
jscpd (duplication < 3% on touched code)	25s
OSV-Scanner (SCA)	7s
Semgrep (SAST)	30s
Trivy (filesystem + container scan)	11s
	1m 47s

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