feat(trials): add trial_packages table, start_trial, get_trials

tests/test_trials.py

@@ -0,0 +1,27 @@
+import pytest
+from datetime import datetime, timezone, timedelta
+from unittest.mock import patch
+from tracker import UsageTracker, DEFAULT_TRIAL_BUDGET
+
+
+@pytest.fixture
+def tracker(tmp_path):
+    return UsageTracker(db_path=str(tmp_path / "test.db"))
+
+
+def test_start_trial_initializes(tracker):
+    tracker.start_trial("Some-Pack")
+    trials = tracker.get_trials()
+    assert len(trials) == 1
+    t = trials[0]
+    assert t["package"] == "Some-Pack"
+    assert t["unused_boot_days"] == 0
+    assert t["budget"] == DEFAULT_TRIAL_BUDGET
+    assert t["days_remaining"] == DEFAULT_TRIAL_BUDGET
+    assert t["expired"] is False
+
+
+def test_start_trial_is_idempotent_resets(tracker):
+    tracker.start_trial("Some-Pack")
+    tracker.start_trial("Some-Pack")
+    assert len(tracker.get_trials()) == 1