goconst counts occurrences across the whole package (including test files)
when deciding whether to flag a non-test file — the exclusion only suppresses
reports FROM test files. Add unexported constants for severity levels, CVSS
types, ecosystem, and reference types in client.go, and update client_test.go
to use them so the total raw-string count per literal drops below threshold.
Migrate .golangci.yml from v1 issues.exclude-rules to v2
linters.exclusions.rules — the v1 key was silently ignored by golangci-lint
v2, so test-file goconst exclusions weren't applied. With the config fixed,
all test-file violations disappear. Extract severity constants in output.go
to fix the 4 remaining non-test goconst violations (CRITICAL/HIGH/MODERATE/
LOW each appear 3x in severityRank, severityBreakdown, and severityColorFn).
CarterPerez-dev