feat(public-berths): expose booleans, metric variants, timestamps

Bring the public berth feed to verbatim NocoDB parity (all fields
except Price, which is held pending an explicit policy decision per
the audit follow-ups Q4). Adds:

- Berth Approved (boolean)
- Water Depth (number)
- Width Is Minimum / Water Depth Is Minimum (boolean)
- Length / Width / Draft / Water Depth / Nominal Boat Size (Metric)
- CreatedAt / UpdatedAt (ISO strings, useful for cache invalidation)

Booleans pass through as nullable to preserve NocoDB's tri-state
checkbox semantics (true / false / unset). Test fixtures cover the
new fields end-to-end including the null-passthrough case.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/unit/services/public-berths.test.ts

@@ -105,6 +105,32 @@ describe('toPublicBerth', () => {
     expect(out.Access).toBe('Car (3t) to Vessel');
   });
 
+  it('exposes booleans + metric variants + timestamps for verbatim NocoDB parity', () => {
+    const out = toPublicBerth(makeBerth(), null, false);
+    expect(out['Berth Approved']).toBe(false);
+    expect(out['Water Depth']).toBe(16.08);
+    expect(out['Width Is Minimum']).toBe(false);
+    expect(out['Water Depth Is Minimum']).toBe(false);
+    expect(out['Length (Metric)']).toBe(63);
+    expect(out['Width (Metric)']).toBe(14.19);
+    expect(out['Draft (Metric)']).toBe(4.42);
+    expect(out['Water Depth (Metric)']).toBe(4.9);
+    expect(out['Nominal Boat Size (Metric)']).toBe(60.96);
+    expect(out.CreatedAt).toMatch(/^\d{4}-\d{2}-\d{2}T/);
+    expect(out.UpdatedAt).toMatch(/^\d{4}-\d{2}-\d{2}T/);
+  });
+
+  it('preserves null booleans (NocoDB checkbox-tri-state parity)', () => {
+    const out = toPublicBerth(
+      makeBerth({ berthApproved: null, widthIsMinimum: null, waterDepthIsMinimum: null }),
+      null,
+      false,
+    );
+    expect(out['Berth Approved']).toBeNull();
+    expect(out['Width Is Minimum']).toBeNull();
+    expect(out['Water Depth Is Minimum']).toBeNull();
+  });
+
   it('inlines map data when present', () => {
     const out = toPublicBerth(makeBerth(), makeMapData(), false);
     expect(out['Map Data']).toEqual({