add dispute functionality for contract duty and implement collection dates

apps/edr-freight-api/src/modules/files/files.service.ts

@@ -104,13 +104,66 @@ export class FilesService {
     });
   }
 
-  /** Replace existing file row for the same resource + code (e.g. contract PDF). */
-  async upsertByCode(input: CreateFileInput): Promise<FileRecord> {
+  /**
+   * Replace the file stored under a resource + code (e.g. contract PDF). The
+   * previous version is retired, not destroyed — pass `replacedBy` to record who
+   * swapped it and why, which is what the version history shows.
+   */
+  async upsertByCode(
+    input: CreateFileInput,
+    replacedBy?: { userId?: string | null; reason?: string | null },
+  ): Promise<FileRecord> {
     const { resourceId, resource, code } = input;
-    await this.filesRepository.deleteByCode(resourceId, resource, code);
+    await this.filesRepository.deleteByCode(
+      resourceId,
+      resource,
+      code,
+      replacedBy,
+    );
     return this.upload(input);
   }
 
+  /**
+   * Every stored version of one document, newest first. `isCurrent` marks the
+   * live row; the rest are superseded uploads kept for audit.
+   */
+  async versionHistory(
+    resourceId: string,
+    resource: string,
+    code: string,
+  ): Promise<
+    Array<{
+      id: string;
+      name: string;
+      url: string;
+      size: number;
+      mimeType: string;
+      uploadedAt: string;
+      isCurrent: boolean;
+      replacedAt: string | null;
+      replacedByUserId: string | null;
+      replaceReason: string | null;
+    }>
+  > {
+    const rows = await this.filesRepository.findVersionHistory(
+      resourceId,
+      resource,
+      code,
+    );
+    return rows.map((row) => ({
+      id: row.id,
+      name: row.name,
+      url: row.url,
+      size: row.size,
+      mimeType: row.mimeType,
+      uploadedAt: row.createdAt.toISOString(),
+      isCurrent: row.deletedAt == null,
+      replacedAt: row.deletedAt ? row.deletedAt.toISOString() : null,
+      replacedByUserId: row.replacedByUserId,
+      replaceReason: row.replaceReason,
+    }));
+  }
+
   async deleteByCode(
     resourceId: string,
     resource: string,