poi-index: extract pipeline (BRouter host) + import job (flagship) + e2e

- poi-extract.sh: PBF download -> osmium tags-filter -> centroid NDJSON +
  manifest, published via the Caddy sidecar at vSwitch-only /poi/*
- osmium-filters.txt + poi-selectors.sql generated from map-core selectors,
  guarded by sync tests so poiCategories stays the single source of truth
- poi-import.sh: checksum verify -> classify into category rows ->
  70% guard (--bootstrap override) -> atomic rename swap; node_exporter
  textfile metric for import outcome
- systemd service+timer units for both halves (monthly, offset)
- cd-infra.yml: ship infrastructure/scripts to the flagship
- e2e: mock /api/pois instead of /api/overpass

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

e2e/planner-routing.test.ts

@@ -108,17 +108,18 @@ test.describe("Planner – routing", () => {
   test("nearby POI snap moves waypoint and prepends note prefix", async ({ page, request }) => {
     const url = await createSession(request);
 
-    await page.route("**/api/overpass", async (route) => {
+    await page.route("**/api/pois*", async (route) => {
       await route.fulfill({
         status: 200,
         contentType: "application/json",
         body: JSON.stringify({
-          elements: [
+          pois: [
             {
-              type: "node",
               id: 99001,
               lat: 52.521,
               lon: 13.406,
+              name: "Stadtbrunnen",
+              category: "drinking_water",
               tags: { amenity: "drinking_water", name: "Stadtbrunnen" },
             },
           ],