fix(kpi): restack provenance integrity on current main

[seonghobae]

Purpose

Restack the strict KPI provenance-integrity repair onto the current protected main without carrying the stale/diverged ancestry of #105.

Exact identities

• protected base immediately before PR creation: c01a663485dc25d2d11f35318aa0a677c07e0320
• predecessor fix(kpi): bind strict provenance to exact log bytes #105 exact source head: 43ed054432f0a5ad8533492d686ddb9c45b80410
• successor exact head: e8ea51cac02bec499c2b80a9509cf8dc155201ea
• ancestry: successor is 4 commits ahead / 0 behind protected base; merge base is exactly protected base

Preserved bounded slice

The successor preserves the exact source blobs from #105 for only these six paths:

• docs/observability-kpi.md — ed83c44732f1ebcf5fa96da397602928841c4178
• scripts/collect-kpi-logs.sh — 8a1848742cfa5191ef5de13248e519e799d8d5cd
• scripts/kpi-gate.mjs — 5fa43b732d510311fd8a7691da933974fbb51de6
• test/kpi-collect.test.ts — edf027cceeaa0373dba16dd62a81e1d16a3761ca
• test/kpi-gate.test.ts — 9235db82b77f19049b2692a40a8d080d5e0f0961
• test/kpi-provenance-snapshot.test.ts — 18e6497eee094282dd947c20bd686ee7c2951227

No predecessor CHANGELOG or unrelated merged-main content is replayed.

Security / data-integrity behavior

The slice binds strict production KPI evidence to the exact retained log bytes that are scored, derives record count/digest/byte size coherently from the retained stream, scores a verified permission-restricted snapshot instead of a mutable original path, strips sensitive ambient authority from KPI child processes, validates HTTPS-only log URL handling, and fails closed when strict evidence persistence cannot retain its configured result.

Evidence boundary

Predecessor CI, reviewer, scanner, model-review and formal-review states do not transfer to this successor. This PR stays Draft until fresh checks execute against this exact head and live protected-base scanner semantics. Pending, absent, skipped, neutral, failed, cancelled, stale, predecessor-head, status-only, model-only, and rate-limited evidence remain non-passing.

This repair does not prove 30 days of real production operation, upstream Logpush/archive authenticity, deployment/release state, customer or revenue evidence, owner/legal/IP-transfer authority, or an outbound license decision.

Related: #3, #5, #27, #29, #104, #105

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

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Run ID: 130a2dfb-eab9-48ef-a274-d566b6150218

📥 Commits

Reviewing files that changed from the base of the PR and between c01a663 and e8ea51c.

📒 Files selected for processing (6)

• docs/observability-kpi.md
• scripts/collect-kpi-logs.sh
• scripts/kpi-gate.mjs
• test/kpi-collect.test.ts
• test/kpi-gate.test.ts
• test/kpi-provenance-snapshot.test.ts

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