feat(documents): importer for organized S3/filesystem buckets

One-shot script that walks an existing organized bucket tree, builds
matching document_folders rows mirroring the path, then inserts
documents + files rows pointing at the existing storage keys verbatim
— no path rewrite. For migrating from a legacy MinIO bucket whose
folder structure is already the source of truth.

Idempotency:
  • Folders: sibling-name unique index swallows duplicate creates;
    we reuse the row on ConflictError.
  • Documents: skipped when (port_id, fileStoragePath) already exists.

Adds StorageBackend.listByPrefix (recursive readdir on filesystem;
listObjectsV2 stream-drain on s3) — the first one-shot caller, not
a hot path. Pure parseImportPath helper extracted to its own module
and unit-tested for trailing slashes, empty intermediate segments,
prefix mismatch, and special-character folder names (8 tests).

Audit log per imported doc carries source='organized-bucket-importer',
storageKey, and folderSegments so the documents inspector can filter
on imports later.

CLI:
  pnpm tsx scripts/import-organized-documents.ts \\
      --port-slug <slug> \\
      --bucket-prefix "legacy-imports/" \\
      (--dry-run | --apply) [--uploaded-by <userId>]

Folds in Prettier post-hook drift on documents.service.ts +
download handler — same lint-staged formatting the earlier commits
already absorbed.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/lib/storage/filesystem.ts

@@ -361,6 +361,43 @@ export class FilesystemBackend implements StorageBackend {
     };
   }
 
+  /**
+   * Recursive readdir under `${root}/${prefix}`. Returns relative-to-root
+   * keys using POSIX separators, sorted alphabetically. Empty prefix lists
+   * every file in the storage root. Used by one-shot importers; not a hot
+   * path. We tolerate ENOENT (prefix doesn't exist) by returning [] so the
+   * caller doesn't have to special-case empty trees.
+   */
+  async listByPrefix(prefix: string): Promise<string[]> {
+    const startAbs = prefix
+      ? this.resolveKey(prefix.replace(/\/+$/, ''))
+      : this.rootResolved;
+
+    const out: string[] = [];
+    async function walk(dir: string): Promise<void> {
+      let entries: import('node:fs').Dirent[];
+      try {
+        entries = await fs.readdir(dir, { withFileTypes: true });
+      } catch (err) {
+        if ((err as NodeJS.ErrnoException).code === 'ENOENT') return;
+        throw err;
+      }
+      for (const entry of entries) {
+        const child = path.join(dir, entry.name);
+        if (entry.isDirectory()) {
+          await walk(child);
+        } else if (entry.isFile()) {
+          out.push(child);
+        }
+      }
+    }
+    await walk(startAbs);
+
+    return out
+      .map((abs) => path.relative(this.rootResolved, abs).split(path.sep).join('/'))
+      .sort();
+  }
+
   /** Used by the proxy route — returns the validated absolute path. */
   resolveKeyForProxy(key: string): string {
     return this.resolveKey(key);

src/lib/storage/index.ts

@@ -72,6 +72,15 @@ export interface StorageBackend {
   /** Generate a short-lived URL the browser can GET from. */
   presignDownload(key: string, opts: PresignOpts): Promise<{ url: string; expiresAt: Date }>;
 
+  /**
+   * Recursively list keys under `prefix`. Returns the relative key for each
+   * object, sorted alphabetically. Empty prefix means "the entire bucket /
+   * storage root". Used by one-shot importers (e.g. organized-bucket
+   * document import) that need to walk a flat key namespace; not meant for
+   * runtime hot paths.
+   */
+  listByPrefix(prefix: string): Promise<string[]>;
+
   readonly name: StorageBackendName;
 }
 

src/lib/storage/s3.ts

@@ -211,6 +211,22 @@ export class S3Backend implements StorageBackend {
     return { url, expiresAt: new Date(Date.now() + expiry * 1000) };
   }
 
+  /**
+   * Recursive listObjectsV2 walk under `prefix`. The minio-js stream emits
+   * one entry per object; we drain it into a flat key array sorted
+   * alphabetically. Used by one-shot importers; not a hot path. Object
+   * "directories" (zero-byte placeholders ending in `/`) are filtered out.
+   */
+  async listByPrefix(prefix: string): Promise<string[]> {
+    const stream = this.client.listObjectsV2(this.bucket, prefix, true);
+    const keys: string[] = [];
+    for await (const obj of stream as AsyncIterable<{ name?: string }>) {
+      if (obj.name && !obj.name.endsWith('/')) keys.push(obj.name);
+    }
+    keys.sort();
+    return keys;
+  }
+
   /** Used by the admin UI's "Test connection" button. */
   async healthCheck(): Promise<{ ok: true } | { ok: false; error: string }> {
     const sentinelKey = `_health/${Date.now()}.txt`;