feat: add multi-BU tenancy with per-user team scoping (Option B)

- Add bu_teams column to users table (migration + fresh schema)
- Create shared KNOWN_TEAMS constant and validateTeams helper
- Expose user teams in auth middleware, login, and /me responses
- Add bu_teams CRUD to user management routes with audit logging
- Make Ivanti FINDINGS_FILTERS configurable via IVANTI_BU_FILTER env var
- Add query-time team filtering to GET /findings and /findings/counts
- Update AuthContext with teams helpers and admin scope toggle
- Create AdminScopeToggle component (My Teams / All BUs)
- Scope ReportingPage findings fetch by user teams
- Scope CompliancePage team selector by user teams
- Scope ExportsPage findings exports by user teams
- Add BU teams multi-select to UserManagement create/edit forms
- Display team badges in user list table

backend/__tests__/jira-jql-window-invariant.property.test.js

@@ -0,0 +1,108 @@
+/**
+ * Property-Based Test: JQL Window Invariant
+ *
+ * Feature: jira-api-compliance-cleanup, Property 1: JQL window is always 72 hours in bulk sync
+ *
+ * For any non-empty array of valid-looking issue keys passed to searchIssuesByKeys(),
+ * the generated JQL string SHALL contain the substring `updated >= -72h` and
+ * SHALL contain the substring `project =`.
+ *
+ * Validates: Requirements 2.1, 2.3
+ */
+
+const fc = require('fast-check');
+
+// Capture the JQL that flows through the HTTP layer.
+let capturedJql = null;
+
+// Mock https to intercept the request URL (which contains the JQL) and return
+// a fake 200 response. This prevents real network calls while letting the
+// real searchIssuesByKeys → searchIssues → jiraGet → jiraRequest chain execute.
+jest.mock('https', () => ({
+  request: jest.fn((options, callback) => {
+    const fullPath = options.path || '';
+    const jqlMatch = fullPath.match(/[?&]jql=([^&]*)/);
+    if (jqlMatch) {
+      capturedJql = decodeURIComponent(jqlMatch[1]);
+    }
+
+    const mockResponse = {
+      statusCode: 200,
+      on: jest.fn((event, handler) => {
+        if (event === 'data') {
+          handler(JSON.stringify({ total: 0, issues: [] }));
+        }
+        if (event === 'end') {
+          handler();
+        }
+      }),
+    };
+    // Use setImmediate so the callback fires on the same tick after promises
+    // resolve, but still asynchronously as Node's http expects.
+    setImmediate(() => callback(mockResponse));
+
+    return {
+      on: jest.fn(),
+      write: jest.fn(),
+      end: jest.fn(),
+      destroy: jest.fn(),
+    };
+  }),
+}));
+
+// Set required env vars before requiring the module so the module-level
+// constants pick them up.
+process.env.JIRA_PROJECT_KEY = 'TESTPROJ';
+process.env.JIRA_BASE_URL = 'https://jira.example.com';
+process.env.JIRA_API_USER = 'testuser';
+process.env.JIRA_API_TOKEN = 'testtoken';
+
+const jiraApi = require('../helpers/jiraApi');
+
+describe('Feature: jira-api-compliance-cleanup, Property 1: JQL window is always 72h in bulk sync', () => {
+  // Use fake timers so the rate-limiter's inter-request delays (1–2 seconds)
+  // resolve instantly. We preserve setImmediate so the https mock callback
+  // still fires asynchronously as expected.
+  beforeAll(() => {
+    jest.useFakeTimers({ doNotFake: ['setImmediate', 'nextTick'] });
+  });
+
+  afterAll(() => {
+    jest.useRealTimers();
+  });
+
+  beforeEach(() => {
+    capturedJql = null;
+  });
+
+  // Generator: produces a valid Jira issue key like "AB-1", "PROJ-42", etc.
+  const issueKeyArb = fc.tuple(
+    fc.stringMatching(/^[A-Z]{2,10}$/),
+    fc.integer({ min: 1, max: 99999 })
+  ).map(([prefix, num]) => `${prefix}-${num}`);
+
+  // Generator: non-empty array of issue keys (1 to 50 keys)
+  const issueKeysArb = fc.array(issueKeyArb, { minLength: 1, maxLength: 50 });
+
+  it('searchIssuesByKeys() always generates JQL containing `updated >= -72h` and `project =`', async () => {
+    await fc.assert(
+      fc.asyncProperty(issueKeysArb, async (issueKeys) => {
+        capturedJql = null;
+
+        // Start the call — it will hit waitForDelay which uses setTimeout
+        const promise = jiraApi.searchIssuesByKeys(issueKeys);
+
+        // Advance fake timers to resolve any pending setTimeout from the
+        // rate limiter's waitForDelay function.
+        jest.advanceTimersByTime(5000);
+
+        await promise;
+
+        expect(capturedJql).not.toBeNull();
+        expect(capturedJql).toContain('updated >= -72h');
+        expect(capturedJql).toContain('project =');
+      }),
+      { numRuns: 100 }
+    );
+  }, 60000);
+});