feat(req-013): add portfolio-list-user-required requirement and batch

- Add REQ-013: Portfolio list filtered by user requirement with acceptance criteria
- Add DCY-003 discovery document for portfolio list user filtering
- Create BAT-003 batch with planning, design, implementation, and verification
- Enhance app/cli/commands/portfolio.py with user-based list filtering
- Add comprehensive tests for portfolio list CLI command with user filtering
- Update docs indices (discovery, srs, batches)
- Improve README with latest capability status

app/cli/commands/portfolio.py

@@ -51,6 +51,18 @@ def _with_service(ctx: typer.Context, callback):
             repository.close()
 
 
+def _with_service_and_repo(ctx: typer.Context, callback):
+    app_context = ctx.obj
+    repository = app_context.repository_factory(app_context.settings)
+    service = PortfolioService(repository)
+    try:
+        result = execute_command(app_context.console, callback=lambda: callback(service, repository, app_context))
+        return result
+    finally:
+        if callable(getattr(type(repository), "close", None)):
+            repository.close()
+
+
 def _confirm(force: bool, message: str) -> None:
     if force:
         return
@@ -62,22 +74,31 @@ def _confirm(force: bool, message: str) -> None:
 @portfolio_app.command("list")
 def list_portfolios(
     ctx: typer.Context,
+    user: str | None = typer.Option(None, "--user", help="Filter by username (required)."),
     broker: str | None = typer.Option(None, help="Filter by broker."),
     status: str | None = typer.Option(None, help="Filter by status."),
     include_tags: list[str] | None = typer.Option(None, "--include-tag", help="Include tag filter. Repeatable."),
     exclude_tags: list[str] | None = typer.Option(None, "--exclude-tag", help="Exclude tag filter. Repeatable."),
     match_mode: str | None = typer.Option(None, "--match-mode", help="AND or OR for include tags."),
 ) -> None:
-    detail = _with_service(
-        ctx,
-        lambda service, app_context: service.list_portfolios(
+    if user is None:
+        ctx.obj.console.print("Error: --user 옵션은 필수입니다.")
+        raise typer.Exit(code=1)
+
+    def _callback(service, repository, app_context):
+        owner = repository.get_user_by_username(user)
+        if owner is None:
+            raise ValueError(f"사용자를 찾을 수 없습니다: {user}")
+        return service.list_portfolios(
+            owner_user_id=owner.id,
             broker=broker,
             status=status,
             include_tags=include_tags,
             exclude_tags=exclude_tags,
             match_mode=match_mode,
-        ),
-    )
+        )
+
+    detail = _with_service_and_repo(ctx, _callback)
     render_output(ctx.obj.console, ctx.obj.output_format, detail, empty_message="No portfolios found.")