feat: goddess API routes, services, and tests (chunk 4)

Add six new goddess-mode API routes (boss fight, consecration,
enlightenment, upgrade purchase, crafting, exploration) alongside
matching service modules and full test suites at 100% coverage.

apps/api/vitest.config.ts

@@ -10,11 +10,7 @@ export default defineConfig({
         "src/db/client.ts",
         "src/index.ts",
         "src/data/materials.ts",
-        // Goddess expansion data files — excluded until goddess routes import them in a later chunk
-        "src/data/goddessConsecrationUpgrades.ts",
-        "src/data/goddessCrafting.ts",
-        "src/data/goddessEnlightenmentUpgrades.ts",
-        "src/data/goddessEquipmentSets.ts",
+        // Goddess materials data file — not directly imported by any route (referenced by ID strings only)
         "src/data/goddessMaterials.ts",
       ],
       thresholds: {