fix(observability): redact secret fields in Sentry field-only log summaries

src/selfhost/sentry.ts

@@ -130,12 +130,18 @@ const SUMMARY_SKIP_KEYS = new Set([
 function summarizeLogFields(obj: Record<string, unknown>): string {
   return Object.entries(obj)
     .filter(([k, v]) => !SUMMARY_SKIP_KEYS.has(k) && v !== null)
-    .map(([k, v]) => `${k}=${typeof v === "object" ? JSON.stringify(v) : String(v)}`)
+    .map(([k, v]) => `${k}=${summarizeLogFieldValue(k, v)}`)
     .filter((part) => part.length <= 90) // a long blob (id/body) belongs in the context, not the title
     .slice(0, 5) // a few salient fields, not a dump
     .join(", ");
 }
 
+function summarizeLogFieldValue(key: string, value: unknown): string {
+  if (SECRET_KEY.test(key)) return "[redacted]";
+  if (typeof value !== "object") return String(value);
+  return JSON.stringify(scrubEvent({ extra: structuredClone(value) }).extra);
+}
+
 /** Forward a structured console line to Sentry when it is an ERROR-level log. The engine logs operational
  *  failures (orb_broker_unavailable, gate-check errors, relay drops, …) as JSON strings, often via console.error.
  *  No-op when Sentry is off, the line isn't a JSON object string, or its level isn't error/fatal — routine logs

test/unit/selfhost-sentry.test.ts

@@ -299,6 +299,25 @@ describe("forwardStructuredLogToSentry — central console.log → Sentry error
       "project=JSONbored/gittensory, closePrecision=0.6, floor=0.8",
     );
   });
+
+  it("redacts secret-keyed values in field-only error summaries (regression)", async () => {
+    await initSentry({ SENTRY_DSN: "d" } as unknown as NodeJS.ProcessEnv);
+    forwardStructuredLogToSentry(
+      JSON.stringify({
+        level: "error",
+        event: "field_only_secret",
+        apiKey: "sensitive-value",
+        password: "sensitive-value",
+        project: "demo",
+        details: { authToken: "nested-sensitive", count: 2 },
+      }),
+    );
+
+    expect(lastCapturedError().name).toBe("field_only_secret");
+    expect(lastCapturedError().message).toBe(
+      'apiKey=[redacted], password=[redacted], project=demo, details={"authToken":"[redacted]","count":2}',
+    );
+  });
 });
 
 describe("installStructuredLogForwarding — central console sink instrumentation (#1468)", () => {