feat: add scripts for database inspection and migration

- Implemented multiple scripts to check and inspect meal plans, scraped data, and accommodations for Munich and Riga.
- Added a migration script to convert scraped data into the application's database format.
- Introduced new database service methods for querying and updating travel rates.
- Enhanced server configuration for serving static files in production.
- Updated PostCSS configuration for consistency.

scripts/debugMunichPlan.js

@@ -0,0 +1,61 @@
+const Database = require("better-sqlite3");
+const path = require("path");
+const sourceDb = new Database(
+  path.join(__dirname, "..", "data", "travel_rates_scraped.sqlite3")
+);
+const typePriority = [
+  "C-Day 1-30",
+  "C-Day 31-120",
+  "C-Day 121 +",
+  "P-Day 1-30",
+  "P-Day 31-120",
+  "P-Day 121 +",
+];
+const rateEntries = sourceDb
+  .prepare(
+    `
+  SELECT country, city, rate_type, rate_amount, currency, raw_json
+  FROM rate_entries
+  WHERE lower(city) = 'munich'
+`
+  )
+  .all();
+const cityRates = {};
+for (const row of rateEntries) {
+  const data = JSON.parse(row.raw_json);
+  const type = (data["Type of Accommodation"] || "").trim();
+  const priority = typePriority.indexOf(type);
+  const key = `${row.country}_${row.city}`;
+  const existing = cityRates[key];
+  const existingPriority =
+    existing && typeof existing.priority === "number"
+      ? existing.priority
+      : Infinity;
+  const isKnownPriority = priority !== -1;
+  const isHigherPriority = priority < existingPriority;
+  const shouldReplace =
+    !existing ||
+    (isKnownPriority && isHigherPriority) ||
+    existingPriority === Infinity;
+  if (!shouldReplace) continue;
+  cityRates[key] = {
+    country: row.country,
+    city: row.city,
+    currency: row.currency,
+    meal_plan_type:
+      type ||
+      existing?.meal_plan_type ||
+      (isKnownPriority ? typePriority[priority] : null),
+    priority: isKnownPriority ? priority : existingPriority,
+    breakfast: parseFloat(data.Breakfast) || existing?.breakfast || null,
+    lunch: parseFloat(data.Lunch || data["Lunch"]) || existing?.lunch || null,
+    dinner: parseFloat(data.Dinner) || existing?.dinner || null,
+    incidentals:
+      parseFloat(data["Incidental Amount"]) || existing?.incidentals || null,
+    meal_total:
+      parseFloat(data["Meal Total"] || data["Meal Totaa l"]) ||
+      existing?.meal_total ||
+      null,
+  };
+}
+console.log(cityRates);