feature: move docs

apps/server/internal/database/migrations/000018_document_aliases.up.sql

@@ -0,0 +1,8 @@
+CREATE TABLE IF NOT EXISTS document_aliases (
+    path TEXT PRIMARY KEY,
+    document_id TEXT NOT NULL REFERENCES documents(id) ON DELETE CASCADE,
+    created_at TEXT NOT NULL
+);
+
+CREATE INDEX IF NOT EXISTS idx_document_aliases_document
+ON document_aliases(document_id);