feat(voyage): add lib/exporters/otlp-format.mjs — OTLP/JSON enum-integer SC #13
Step 10 av v4.1-execute (Wave 2, Session 3).
Pure function transformToOtlpJson(records) → OTLP/JSON v1.0 metrics payload
matching OTLP metrics.proto wire format.
CRITICAL (per research/01 dim 4 + risk-assessor CRITICAL 2):
- AggregationTemporality enum values er INTEGERS i JSON, IKKE strings
("CUMULATIVE" → 2, ikke "CUMULATIVE")
- timeUnixNano er uint64 over wire — emit som decimal STRING i JSON for å
unngå JS Number precision loss på nanosekund-skala
Inline integer enum constants ved module-scope:
- AGG_TEMPORALITY_UNSPECIFIED = 0
- AGG_TEMPORALITY_DELTA = 1
- AGG_TEMPORALITY_CUMULATIVE = 2
- DATA_POINT_FLAGS_NONE = 0
- DATA_POINT_FLAGS_NO_RECORDED_VALUE_MASK = 1
Output struktur: resourceMetrics → scopeMetrics → metrics array. Sum-metrics
(counters: *_total, *_count, *_passed, *_failed, *_skipped) får sum +
isMonotonic + aggregationTemporality. Andre får gauge.
Tester (7 nye, baseline 406 → 413):
- SC #13: typeof aggregationTemporality === 'number' (HEART of SC #13)
- SC #13: enum-konstant drift-pin (typeof + verdi-assert)
- SC #13: typeof timeUnixNano === 'string' (precision-loss mitigation)
- SC #13: strukturell shape-assertion
- Empty input → valid envelope, tomt metrics-array
- isSum heuristic counter vs gauge
- Allowlist-redaksjon sanity (command_excerpt + session_id leaker ikke)
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Kjell Tore Guttormsen
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