feat(23-05): implement getCompanyAutomationGate reader

- COALESCE(..., false) query keyed on company_id; absent row/null/NaN -> all-false
- never throws; type-check and vitest suite pass

lib/services/phishing-automation-gate.ts

@@ -0,0 +1,58 @@
+/**
+ * Phase 23 D-06/D-07: per-company phishing automation gate reader.
+ *
+ * Opt-in model — a company with no `phishing_automation_gate` row has all
+ * three stages OFF. Mirrors the COALESCE(..., false)-over-LEFT-JOIN pattern
+ * used by `app/api/admin/phishing-automation/route.ts`, but scoped to a
+ * single company for the webhook's per-ticket gate check.
+ */
+
+import { postgresClient } from './postgres-client';
+
+export interface CompanyAutomationGate {
+  autoParse: boolean;
+  autoClassify: boolean;
+  autoReport: boolean;
+}
+
+const ALL_FALSE: CompanyAutomationGate = {
+  autoParse: false,
+  autoClassify: false,
+  autoReport: false,
+};
+
+/**
+ * Reads the automation gate flags for a company. Absent row, null, or NaN
+ * companyId all resolve to all-false — never throws.
+ */
+export async function getCompanyAutomationGate(
+  companyId: number | null
+): Promise<CompanyAutomationGate> {
+  if (companyId === null || Number.isNaN(companyId)) {
+    return { ...ALL_FALSE };
+  }
+
+  const result = await postgresClient.query<{
+    auto_parse: boolean;
+    auto_classify: boolean;
+    auto_report: boolean;
+  }>(
+    `SELECT COALESCE(auto_parse, false) AS auto_parse,
+            COALESCE(auto_classify, false) AS auto_classify,
+            COALESCE(auto_report, false) AS auto_report
+       FROM phishing_automation_gate
+      WHERE company_id = $1`,
+    [companyId]
+  );
+
+  const row = result.rows[0];
+  if (!row) {
+    return { ...ALL_FALSE };
+  }
+
+  return {
+    autoParse: row.auto_parse,
+    autoClassify: row.auto_classify,
+    autoReport: row.auto_report,
+  };
+}