feat: Add distillery enrichment cache

Caches AI enrichment results per distillery to save API calls:
- New table: enrichment_cache (distillery, tags, hit_count)
- New service: cache-enrichment.ts (get, save, increment, stats)
- enrich-data.ts checks cache before AI query
- Saves to cache after successful AI response
- Returns cached: true/false flag for transparency

Benefits:
- 0 API cost for repeated distillery scans
- Near-instant response for cached distilleries
- Shared across all users

src/app/actions/enrich-data.ts

@@ -6,6 +6,7 @@ import { trackApiUsage } from '@/services/track-api-usage';
 import { deductCredits } from '@/services/credit-service';
 import { getAllSystemTags } from '@/services/tags';
 import { getAIProvider, getOpenRouterClient, OPENROUTER_PROVIDER_PREFERENCES } from '@/lib/openrouter';
+import { getEnrichmentCache, saveEnrichmentCache, incrementCacheHit } from '@/services/cache-enrichment';
 
 // Native Schema Definition for Enrichment Data
 const enrichmentSchema = {
@@ -146,6 +147,31 @@ export async function enrichData(name: string, distillery: string, availableTags
         return { success: false, error: 'OPENROUTER_API_KEY is not configured.' };
     }
 
+    // ========================================
+    // CACHE CHECK - Return cached data if available
+    // ========================================
+    if (distillery?.trim()) {
+        try {
+            const cached = await getEnrichmentCache(distillery);
+            if (cached) {
+                console.log(`[EnrichData] ✅ CACHE HIT for: ${distillery}`);
+                // Fire and forget: increment hit counter
+                incrementCacheHit(distillery).catch(() => { });
+                return {
+                    success: true,
+                    data: cached,
+                    cached: true,
+                    provider: 'cache',
+                    perf: { apiDuration: 0 }
+                };
+            }
+            console.log(`[EnrichData] ❌ Cache MISS for: ${distillery}`);
+        } catch (cacheError) {
+            console.warn('[EnrichData] Cache lookup failed:', cacheError);
+            // Continue with AI query
+        }
+    }
+
     let supabase;
     try {
         let tagsToUse = availableTags;
@@ -184,6 +210,15 @@ Instructions:
 
         console.log('[EnrichData] Response:', result.data);
 
+        // ========================================
+        // SAVE TO CACHE - Store for future lookups
+        // ========================================
+        if (distillery?.trim()) {
+            saveEnrichmentCache(distillery, result.data).catch((err) => {
+                console.warn('[EnrichData] Cache save failed:', err);
+            });
+        }
+
         // Track usage
         await trackApiUsage({
             userId: userId,
@@ -197,6 +232,7 @@ Instructions:
         return {
             success: true,
             data: result.data,
+            cached: false,
             provider,
             perf: {
                 apiDuration: result.apiTime