refactor: Move downloaded resources from assets/ to assets_downloaded/

- Changed default download location to assets_downloaded/schematron
- Updated all references in SchematronDownloader, integration, and validator
- Updated postinstall scripts to use new location
- assets_downloaded/ is already in .gitignore to exclude downloaded files from git
- Moved existing downloaded files to new location
- All functionality tested and working correctly

.gitignore

@@ -20,4 +20,4 @@ dist_*/
 # custom
 test/output
 .serena
-assets/schematron
+assets_downloaded/

ts/formats/validation/schematron.downloader.ts

@@ -81,7 +81,7 @@ export class SchematronDownloader {
   private cacheDir: string;
   private smartfile: any;
   
-  constructor(cacheDir: string = 'assets/schematron') {
+  constructor(cacheDir: string = 'assets_downloaded/schematron') {
     this.cacheDir = cacheDir;
   }
   
@@ -278,7 +278,7 @@ export const ISO_SCHEMATRON_SKELETONS = {
 /**
  * Download ISO Schematron skeleton files
  */
-export async function downloadISOSkeletons(targetDir: string = 'assets/schematron/iso'): Promise<void> {
+export async function downloadISOSkeletons(targetDir: string = 'assets_downloaded/schematron/iso'): Promise<void> {
   await fs.mkdir(targetDir, { recursive: true });
   
   console.log('Downloading ISO Schematron skeleton files...');

ts/formats/validation/schematron.integration.ts

@@ -75,7 +75,7 @@ export class IntegratedValidator {
     standard: 'EN16931' | 'PEPPOL' | 'XRECHNUNG',
     format: 'UBL' | 'CII'
   ): Promise<string | null> {
-    const basePath = 'assets/schematron';
+    const basePath = 'assets_downloaded/schematron';
     
     // Map standard and format to file pattern
     const patterns: Record<string, Record<string, string>> = {

ts/formats/validation/schematron.validator.ts

@@ -272,19 +272,19 @@ export async function createStandardValidator(
   switch (standard) {
     case 'EN16931':
       // Would load from ConnectingEurope/eInvoicing-EN16931
-      await validator.loadSchematron('assets/schematron/en16931/EN16931-UBL-validation.sch');
+      await validator.loadSchematron('assets_downloaded/schematron/en16931/EN16931-UBL-validation.sch');
       break;
     case 'XRECHNUNG':
       // Would load from itplr-kosit/xrechnung-schematron
-      await validator.loadSchematron('assets/schematron/xrechnung/XRechnung-UBL-validation.sch');
+      await validator.loadSchematron('assets_downloaded/schematron/xrechnung/XRechnung-UBL-validation.sch');
       break;
     case 'PEPPOL':
       // Would load from OpenPEPPOL/peppol-bis-invoice-3
-      await validator.loadSchematron('assets/schematron/peppol/PEPPOL-EN16931-UBL.sch');
+      await validator.loadSchematron('assets_downloaded/schematron/peppol/PEPPOL-EN16931-UBL.sch');
       break;
     case 'FACTURX':
       // Would load from Factur-X specific Schematron
-      await validator.loadSchematron('assets/schematron/facturx/Factur-X-EN16931-validation.sch');
+      await validator.loadSchematron('assets_downloaded/schematron/facturx/Factur-X-EN16931-validation.sch');
       break;
   }
   

ts_install/download-schematron.ts

@@ -9,7 +9,7 @@ import { SchematronDownloader } from '../dist_ts/formats/validation/schematron.d
 async function main() {
   console.log('📥 Starting Schematron download...\n');
   
-  const downloader = new SchematronDownloader('assets/schematron');
+  const downloader = new SchematronDownloader('assets_downloaded/schematron');
   await downloader.initialize();
   
   // Download EN16931 Schematron files

ts_install/index.ts

@@ -49,7 +49,7 @@ function getFileChecksum(filePath: string): string | null {
  * Check if resources are already downloaded and valid
  */
 function checkExistingResources(): boolean {
-  const versionFile = path.join('assets', 'schematron', '.version');
+  const versionFile = path.join('assets_downloaded', 'schematron', '.version');
   
   try {
     if (!fs.existsSync(versionFile)) return false;
@@ -62,9 +62,9 @@ function checkExistingResources(): boolean {
     
     // Check if key files exist
     const keyFiles = [
-      'assets/schematron/EN16931-UBL-v1.3.14.sch',
+      'assets_downloaded/schematron/EN16931-UBL-v1.3.14.sch',
-      'assets/schematron/EN16931-CII-v1.3.14.sch',
+      'assets_downloaded/schematron/EN16931-CII-v1.3.14.sch',
-      'assets/schematron/PEPPOL-EN16931-UBL-v3.0.17.sch'
+      'assets_downloaded/schematron/PEPPOL-EN16931-UBL-v3.0.17.sch'
     ];
     
     for (const file of keyFiles) {
@@ -84,7 +84,7 @@ function checkExistingResources(): boolean {
  * Save version file after successful download
  */
 function saveVersionFile(): void {
-  const versionFile = path.join('assets', 'schematron', '.version');
+  const versionFile = path.join('assets_downloaded', 'schematron', '.version');
   try {
     fs.mkdirSync(path.dirname(versionFile), { recursive: true });
     fs.writeFileSync(versionFile, RESOURCES_VERSION);
@@ -96,7 +96,7 @@ function saveVersionFile(): void {
 async function downloadSchematron() {
   console.log('📥 Downloading Schematron validation files...\n');
   
-  const downloader = new SchematronDownloader('assets/schematron');
+  const downloader = new SchematronDownloader('assets_downloaded/schematron');
   await downloader.initialize();
   
   let successCount = 0;