Add volume mapping docs and build/version metadata

Add a volume-mapping guide and surface build/version metadata throughout the project.

Changes included:
- documentation: Add documentation/deployment/volume-mapping.md and update TABLEOFCONTENTS.md and README to reference it (helps users align download client and RMAB paths).
- CI: Capture package.json version in .github/workflows/build-unified-image.yml, pass APP_VERSION as a build-arg, and update the Discord notification to show the semantic version and pull `:latest`.
- Docker: Declare ARG APP_VERSION and expose NEXT_PUBLIC_APP_VERSION / APP_VERSION / GIT_COMMIT env vars in dockerfile.unified so runtime and client can read the semantic version and commit.
- App API/UI: Update src/app/api/version/route.ts and src/components/ui/VersionBadge.tsx to prefer semantic app version (APP_VERSION / NEXT_PUBLIC_APP_VERSION), include fullVersion and commit info, show commit in tooltip, and adjust fallback/dev labels.
- Tests: Update tests (system.routes.test.ts and VersionBadge.test.tsx) to reflect the new version/commit fields and behavior.
- Audible integration: Add ipRedirectOverride query param to multiple Audible requests to avoid IP-based region redirects.
- Misc: Bump package.json version to 1.0.0.

These changes make version information consistent between build, runtime, and UI, improve CI notifications, add user guidance for common volume-mapping issues, and harden Audible scraping against region redirects.

src/lib/integrations/audible.service.ts

@@ -215,7 +215,10 @@ export class AudibleService {
         logger.info(` Fetching page ${page}/${maxPages}...`);
 
         const response = await this.fetchWithRetry('/adblbestsellers', {
-          params: page > 1 ? { page } : {},
+          params: {
+            ipRedirectOverride: 'true', // Explicitly include to prevent IP-based region redirects
+            ...(page > 1 ? { page } : {}),
+          },
         });
         const $ = cheerio.load(response.data);
 
@@ -307,7 +310,10 @@ export class AudibleService {
         logger.info(` Fetching page ${page}/${maxPages}...`);
 
         const response = await this.fetchWithRetry('/newreleases', {
-          params: page > 1 ? { page } : {},
+          params: {
+            ipRedirectOverride: 'true', // Explicitly include to prevent IP-based region redirects
+            ...(page > 1 ? { page } : {}),
+          },
         });
         const $ = cheerio.load(response.data);
 
@@ -392,6 +398,7 @@ export class AudibleService {
 
       const response = await this.fetchWithRetry('/search', {
         params: {
+          ipRedirectOverride: 'true', // Explicitly include to prevent IP-based region redirects
           keywords: query,
           page,
         },
@@ -572,7 +579,11 @@ export class AudibleService {
    */
   private async scrapeAudibleDetails(asin: string): Promise<AudibleAudiobook | null> {
     try {
-      const response = await this.fetchWithRetry(`/pd/${asin}`);
+      const response = await this.fetchWithRetry(`/pd/${asin}`, {
+        params: {
+          ipRedirectOverride: 'true', // Explicitly include to prevent IP-based region redirects
+        },
+      });
       const $ = cheerio.load(response.data);
 
       // Initialize result object