Add works table and ASIN deduping

Add persistent cross-ASIN "works" mapping and client-side deduplication to improve library matching. Introduces a Prisma migration and models (Work, WorkAsin) plus src/lib/services/works.service for persisting dedup groups, seeding ASINs at request time, and sibling lookup. Adds a deduplication utility (deduplicate-audiobooks) that normalizes titles/narrators, compares durations, and returns grouping metadata; API routes (search, author, series) now deduplicate results before enrichment and fire-and-forget persist groups. Adds sibling-ASIN expansion into audiobook matcher and expands getAvailableAsins accordingly. Extracts runtime parsing into a shared parse-runtime util and updates audible scrapers/services to use it. Includes unit tests for dedup logic and works service and updates test Prisma mocks.

src/lib/utils/parse-runtime.ts

@@ -0,0 +1,44 @@
+/**
+ * Component: Runtime Parsing Utility
+ * Documentation: documentation/integrations/audible.md
+ *
+ * Shared runtime/duration text parser extracted from AudibleService.
+ * Handles all i18n patterns (English, German, Spanish, French) via
+ * language-specific regex patterns in LanguageConfig.
+ */
+
+import type { LanguageConfig } from '../constants/language-config';
+
+/**
+ * Parse runtime text (e.g. "12 hrs and 30 mins", "5 Std. 20 Min.")
+ * into total minutes using language-specific patterns.
+ *
+ * @param runtimeText - Raw runtime string from Audible HTML
+ * @param langConfig  - Language configuration with hour/minute regex patterns
+ * @returns Total minutes, or undefined if no duration could be parsed
+ */
+export function parseRuntime(runtimeText: string, langConfig: LanguageConfig): number | undefined {
+  if (!runtimeText) return undefined;
+
+  let totalMinutes = 0;
+
+  // Try each hour pattern until one matches
+  for (const pattern of langConfig.scraping.runtimeHourPatterns) {
+    const match = runtimeText.match(pattern);
+    if (match) {
+      totalMinutes += parseInt(match[1]) * 60;
+      break;
+    }
+  }
+
+  // Try each minute pattern until one matches
+  for (const pattern of langConfig.scraping.runtimeMinutePatterns) {
+    const match = runtimeText.match(pattern);
+    if (match) {
+      totalMinutes += parseInt(match[1]);
+      break;
+    }
+  }
+
+  return totalMinutes > 0 ? totalMinutes : undefined;
+}