chore: add qsl compatibility metadata and pin alignment (#37)

* chore: add qsl compatibility metadata and pin alignment

Co-Authored-By: Codex <noreply@openai.com>

* fix: remove qsl metadata test trailing blank line

Co-Authored-By: Codex <noreply@openai.com>

---------

Co-authored-by: Codex <noreply@openai.com>

Author: Pigbibi

qsl.toml

@@ -0,0 +1,9 @@
+tier = "strategy-library"
+ring = 1
+
+[compat]
+bundle = "2026.07.0"
+requires = [
+  "pandas>=2.0",
+  "yfinance>=0.2.40",
+]

tests/test_qsl_compat_metadata.py

@@ -0,0 +1,11 @@
+from pathlib import Path
+import tomllib
+
+
+def test_qsl_compat_metadata_exists_and_bundle() -> None:
+    qsl_path = Path(__file__).resolve().parents[1] / "qsl.toml"
+    assert qsl_path.exists(), "qsl.toml missing"
+    with qsl_path.open("rb") as f:
+        data = tomllib.load(f)
+
+    assert data.get("compat", {}).get("bundle") == "2026.07.0", "compat.bundle mismatch"