feat(pitch-deck): data room — file sharing and investor uploads

- lib/dataroom-storage.ts: local volume storage (DATAROOM_PATH env var,
  default /data/dataroom) replacing NextCloud WebDAV
- Admin API: upload documents, rename, delete, manage per-investor releases
- Investor API: list released documents, stream download with audit log,
  upload own documents (max DATAROOM_MAX_UPLOAD_MB, default 50MB)
- /pitch-admin/dataroom: document list + release toggles + investor uploads tab
- /dataroom: investor-facing document library + upload section
- All reads and writes logged to pitch_audit_logs
- Migration 005: dataroom_documents, dataroom_releases, dataroom_investor_uploads
- AdminShell: Data Room nav link (FolderOpen icon)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pitch-deck/app/api/admin/migrate/route.ts

@@ -122,6 +122,39 @@ export async function POST(request: NextRequest) {
     `CREATE INDEX IF NOT EXISTS idx_fp_liquid_scenario ON fp_liquiditaet(scenario_id)`,
     `CREATE INDEX IF NOT EXISTS idx_fp_guv_scenario ON fp_guv(scenario_id)`,
     `CREATE INDEX IF NOT EXISTS idx_fp_overrides_lookup ON fp_cell_overrides(scenario_id, sheet_name, row_id)`,
+    // 005 — data room
+    `CREATE TABLE IF NOT EXISTS dataroom_documents (
+      id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+      filename TEXT NOT NULL,
+      file_path TEXT NOT NULL,
+      display_name TEXT,
+      mime_type TEXT,
+      file_size BIGINT,
+      uploaded_by TEXT NOT NULL DEFAULT 'admin',
+      created_at TIMESTAMPTZ DEFAULT NOW(),
+      updated_at TIMESTAMPTZ DEFAULT NOW()
+    )`,
+    `CREATE TABLE IF NOT EXISTS dataroom_releases (
+      id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+      document_id UUID REFERENCES dataroom_documents(id) ON DELETE CASCADE,
+      investor_id UUID REFERENCES pitch_investors(id) ON DELETE CASCADE,
+      released_by TEXT NOT NULL,
+      released_at TIMESTAMPTZ DEFAULT NOW(),
+      UNIQUE(document_id, investor_id)
+    )`,
+    `CREATE TABLE IF NOT EXISTS dataroom_investor_uploads (
+      id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+      investor_id UUID REFERENCES pitch_investors(id) ON DELETE CASCADE,
+      filename TEXT NOT NULL,
+      file_path TEXT NOT NULL,
+      display_name TEXT,
+      mime_type TEXT,
+      file_size BIGINT,
+      created_at TIMESTAMPTZ DEFAULT NOW()
+    )`,
+    `CREATE INDEX IF NOT EXISTS idx_dataroom_releases_investor ON dataroom_releases(investor_id)`,
+    `CREATE INDEX IF NOT EXISTS idx_dataroom_releases_document ON dataroom_releases(document_id)`,
+    `CREATE INDEX IF NOT EXISTS idx_dataroom_uploads_investor ON dataroom_investor_uploads(investor_id)`,
   ]
 
   for (const sql of statements) {