Add external import sources, work history, screening fields and Phase 1 docs

- New ExternalImportSource and ExternalWorkHistoryEntry models, controller and migrations
- Screening fields on external profile imports
- Admin and provider profile views, routes and workflow tests updated
- Phase 1 validation, route inventory, gap report template and roadmap docs
- Add the Google Sheets work-order parser tool (tools/google-sheets-wo-parser)

tools/google-sheets-wo-parser/tests/fixtures.cjs

@@ -0,0 +1,23 @@
+module.exports = {
+  fieldNationNew: {
+    id: 'field-nation-message-001',
+    from: 'Field Nation <notifications@fieldnation.example>',
+    subject: 'New Work Order: Network troubleshooting',
+    date: new Date('2026-08-02T14:00:00Z'),
+    plainBody: `Field Nation\nNew work order available\nWork Order #19660234\nTitle: Network troubleshooting\nBuyer: Example Field Services\nLocation: Raleigh, NC 27609\nService Date: Monday, Aug 3 @ 8:00 AM\nPay Total: $225.00\nPay Type: Hourly Rate\nEstimated 3 hours\nView work order: https://app.fieldnation.com/workorders/19660234`
+  },
+  workMarketRouted: {
+    id: 'workmarket-message-002',
+    from: 'WorkMarket <no-reply@workmarket.example>',
+    subject: 'You have been routed a work order',
+    date: new Date('2026-08-02T14:05:00Z'),
+    plainBody: `WorkMarket\nYou have been routed a work order.\nWork Order ID: WM-884221\nJob Title: POS terminal swap\nCompany: Example Buyer LLC\nService Location: Durham, NC 27713\nScheduled Time: Tuesday, Aug 4 @ 10:00 AM\nTotal Pay: $180.00\nFixed Rate\nOpen assignment: https://www.workmarket.com/work-orders/WM-884221`
+  },
+  unknown: {
+    id: 'unknown-message-003',
+    from: 'Some Sender <example@example.com>',
+    subject: 'Hello',
+    date: new Date('2026-08-02T14:10:00Z'),
+    plainBody: 'This is not a work-order notification.'
+  }
+};

tools/google-sheets-wo-parser/tests/run-tests.cjs

@@ -0,0 +1,43 @@
+const fs = require('fs');
+const path = require('path');
+const vm = require('vm');
+const assert = require('assert/strict');
+const fixtures = require('./fixtures.cjs');
+
+const context = { console, Date, Math, Number, String, Object, RegExp };
+vm.createContext(context);
+for (const file of ['Config.gs', 'Parsers.gs', 'Code.gs']) {
+  const source = fs.readFileSync(path.join(__dirname, '..', 'src', file), 'utf8')
+    .replace(/^const /gm, 'var ');
+  vm.runInContext(source, context, { filename: file });
+}
+
+const fieldNation = context.parseWorkOrderMessage_(fixtures.fieldNationNew);
+assert.equal(fieldNation.ok, true);
+assert.equal(fieldNation.record.platform, 'Field Nation');
+assert.equal(fieldNation.record.workOrderId, '19660234');
+assert.equal(fieldNation.record.payTotal, 225);
+assert.equal(fieldNation.record.effectiveRate, 75);
+assert.equal(fieldNation.record.city, 'Raleigh');
+
+const workMarket = context.parseWorkOrderMessage_(fixtures.workMarketRouted);
+assert.equal(workMarket.ok, true);
+assert.equal(workMarket.record.platform, 'WorkMarket');
+assert.equal(workMarket.record.notificationType, 'Routed');
+assert.equal(workMarket.record.workOrderId, 'WM-884221');
+assert.equal(workMarket.record.payType, 'Fixed Rate');
+
+const unknown = context.parseWorkOrderMessage_(fixtures.unknown);
+assert.equal(unknown.ok, false);
+
+assert.equal(context.isSupportedPlatformSender_('Field Nation <alerts@fieldnation.com>'), true);
+assert.equal(context.isSupportedPlatformSender_('WorkMarket <no-reply@workmarket.com>'), true);
+assert.equal(context.isSupportedPlatformSender_('Unrelated sender <alerts@example.com>'), false);
+assert.equal(
+  context.buildPlatformInboxQuery_({ lookbackDays: 7 }, { getName: () => 'WO Parser/Processed' }),
+  'in:inbox {from:fieldnation from:workmarket} -label:"WO Parser/Processed" newer_than:7d'
+);
+assert.equal(context.isPublicTemplate_({ getId: () => context.WO_PARSER.TEMPLATE_SPREADSHEET_ID }), true);
+assert.equal(context.isPublicTemplate_({ getId: () => 'recipient-copy-id' }), false);
+
+console.log('Parser fixtures passed.');