fix: probe-drift round 2 — stale monitoring expectations (health check, PVE API, GPU port 80, report provenance)

Second probe-drift correction pass after #65/#66/#68. All four legs were stale
consumer expectations, not live faults.

1. scripts/agent-health-check.py (v4)
   - abiba declared pi-only runtime (harness purge): Hermes-era gateway, config
     and wrapper legs are skipped instead of failing.
   - koby declared report_only (captain ruling 2026-08-17, Rule 17): every koby
     leg is detected and reported, never counted as a fleet failure or repaired.
   - koby's CT 111 mapping corrected to storepve (.6); the old amdpve mapping
     made `pct status 111` fail and read as ct-unreachable.
   - wrapper check no longer FAILs .env-based wrappers that legitimately never
     invoke infisical (koonimo).
   - keys load in main() (load_agent_keys) so the module is importable/testable.
   - every run prints absolute execution provenance (script + cwd), in the header
     and in --json.
   Before: 6 FAILURE(S). After: 0 failures, koby reported read-only.

2. infrastructure-monitoring.prose.md
   - PVE API probe repointed from CT 116 (no pveproxy, 000) to the five real
     nodes on https://<node>:8006/api2/json/version, all 401 = alive.
   - any-HTTP-response liveness rule added (401/3xx alive; 000/timeout = DOWN).
   - LiteLLM health documented as 301 -> /litellm/health/liveliness, not bare 200.

3. gpu-monitor.prose.md
   - GPU health probes on :8080 (or router /health/unified); bare port 80 on a
     GPU host is forbidden (no listener -> false DEGRADED).
   - router /health/unified 301 -> /gpu/gpu-data documented as alive.
   - port-discipline + liveness rule + direct-fallback execution step.

4. Report provenance (all contracts)
   - docs/AUTHORING-GUIDE.md documents the rule; scripts/prose-lint.sh enforces
     that any **Report format** contract states an absolute path (pwd -P).
   - provenance added to gpu-monitor, infrastructure-monitoring, proxmox-monitor.

Tests: tests/test_probe_drift.py (23 passed); prose-lint.sh clean + shellcheck
clean; CI frontmatter validation passes. Evidence with per-leg before/after and
absolute paths: docs/probe-drift-round2-evidence.md.

scripts/prose-lint.sh

@@ -57,7 +57,7 @@ echo "── 2. Regression detection ──"
 
 # Grafana /grafana/ as nginx route or URL path (reverted 2026-07-02)
 # EXCLUDE: filesystem paths (/opt/monitoring/grafana/...), directory creation, revert docs
-GRAFANA_HITS=$(grep -rn '/grafana/' *.prose.md 2>/dev/null \
+GRAFANA_HITS=$(grep -rn '/grafana/' ./*.prose.md 2>/dev/null \
   | grep -v '/opt/monitoring/grafana/' \
   | grep -v 'was tried and reverted\|was reverted\|do not re-add\|NOT recommended' \
   | grep -v 'mkdir.*grafana\|Create.*grafana' \
@@ -71,7 +71,7 @@ else
 fi
 
 # Stale CT IDs (CT 122, CT 123 as CT IDs — not IPs .122, .123)
-CT_STALE=$(grep -rn '\bCT 122\b' *.prose.md 2>/dev/null || true)
+CT_STALE=$(grep -rn '\bCT 122\b' ./*.prose.md 2>/dev/null || true)
 if [ -n "$CT_STALE" ]; then
   echo "  ❌ REGRESSION: CT 122 used as CT ID — Tanko is CT 112"
   echo "$CT_STALE"
@@ -84,6 +84,25 @@ fi
 # .122/.123 are correct — verified reachable bridge IPs for Tanko/Mumuni
 echo "  ✅ IP consistency verified (.19=.122=.123 all reachable)"
 
+# Report provenance — every contract report must state the absolute path it
+# executed from, so a stale-consumer report is distinguishable from a real fault
+# at read time (2026-09-09 probe-drift incident: three false DEGRADED rounds).
+PROV_FILES=$(grep -rl '\*\*Report format\*\*' ./*.prose.md 2>/dev/null || true)
+if [ -n "$PROV_FILES" ]; then
+  PROV_BAD=0
+  while IFS= read -r f; do
+    if ! grep -qE 'absolute path|pwd -P|executed from' "$f"; then
+      echo "  ❌ $f: **Report format** lacks execution provenance (absolute path / pwd -P)"
+      PROV_BAD=1
+    fi
+  done <<< "$PROV_FILES"
+  if [ "$PROV_BAD" -eq 1 ]; then
+    FAILED=1
+  else
+    echo "  ✅ Report provenance present in all report-format contracts"
+  fi
+fi
+
 # ── 3. Cross-contract consistency ──
 echo ""
 echo "── 3. Cross-contract consistency ──"