feat: add support for 7z, PDF, STL, and other document types

- Add 7Z and DOCUMENT to ArchiveType enum
- Detect .7z, .pdf, .stl, .obj, .3mf, .step, .blend, .gcode, .svg,
  .dxf, .ai, .eps, .psd files as fetchable documents
- Handle DOCUMENT and 7Z formats in worker pipeline (skip extraction,
  record file as single entry)
- Add Prisma migration for new enum values

prisma/migrations/20260321180000_add_archive_types/migration.sql

@@ -0,0 +1,3 @@
+-- AlterEnum
+ALTER TYPE "ArchiveType" ADD VALUE 'SEVEN_Z';
+ALTER TYPE "ArchiveType" ADD VALUE 'DOCUMENT';

prisma/schema.prisma

@@ -377,6 +377,8 @@ enum ChannelRole {
 enum ArchiveType {
   ZIP
   RAR
+  SEVEN_Z
+  DOCUMENT
 }
 
 enum IngestionStatus {

worker/src/archive/detect.ts

@@ -1,4 +1,4 @@
-export type ArchiveFormat = "ZIP" | "RAR";
+export type ArchiveFormat = "ZIP" | "RAR" | "7Z" | "DOCUMENT";
 
 export interface MultipartInfo {
   baseName: string;
@@ -48,6 +48,9 @@ const patterns: {
   },
 ];
 
+/** Extensions we recognize as fetchable documents (archives + standalone files) */
+const DOCUMENT_EXTENSIONS = /\.(pdf|stl|obj|3mf|step|stp|blend|gcode|svg|dxf|ai|eps|psd)$/i;
+
 /**
  * Detect if a filename is an archive and extract multipart info.
  */
@@ -85,11 +88,32 @@ export function detectArchive(fileName: string): MultipartInfo | null {
     };
   }
 
+  // Single .7z file
+  if (/\.7z$/i.test(fileName)) {
+    return {
+      baseName: fileName.replace(/\.7z$/i, ""),
+      partNumber: -1,
+      format: "7Z",
+      pattern: "SINGLE",
+    };
+  }
+
+  // Standalone documents (PDFs, STLs, 3D files, etc.)
+  if (DOCUMENT_EXTENSIONS.test(fileName)) {
+    const ext = fileName.match(DOCUMENT_EXTENSIONS)![0];
+    return {
+      baseName: fileName.replace(DOCUMENT_EXTENSIONS, ""),
+      partNumber: -1,
+      format: "DOCUMENT",
+      pattern: "SINGLE",
+    };
+  }
+
   return null;
 }
 
 /**
- * Check if a filename looks like any archive attachment we should process.
+ * Check if a filename looks like any attachment we should process.
  */
 export function isArchiveAttachment(fileName: string): boolean {
   return detectArchive(fileName) !== null;

worker/src/worker.ts

@@ -873,8 +873,21 @@ async function processOneArchiveSet(
     try {
       if (archiveSet.type === "ZIP") {
         entries = await readZipCentralDirectory(tempPaths);
-      } else {
+      } else if (archiveSet.type === "RAR") {
         entries = await readRarContents(tempPaths[0]);
+      } else if (archiveSet.type === "DOCUMENT" || archiveSet.type === "7Z") {
+        // Standalone documents (PDF, STL, etc.) and 7z files — no extraction needed,
+        // just record the file itself as the single entry
+        const part = archiveSet.parts[0];
+        const ext = part.fileName.match(/\.([^.]+)$/)?.[1] ?? null;
+        entries = [{
+          path: part.fileName,
+          fileName: part.fileName,
+          extension: ext,
+          compressedSize: part.fileSize,
+          uncompressedSize: part.fileSize,
+          crc32: null,
+        }];
       }
     } catch (err) {
       accountLog.warn({ err, baseName: archiveSet.baseName }, "Failed to read archive metadata, ingesting without file list");
@@ -975,7 +988,7 @@ async function processOneArchiveSet(
       contentHash,
       fileName: archiveName,
       fileSize: totalSize,
-      archiveType: archiveSet.type,
+      archiveType: archiveSet.type === "7Z" ? "SEVEN_Z" : archiveSet.type,
       sourceChannelId: channel.id,
       sourceMessageId: archiveSet.parts[0].id,
       sourceTopicId,