feat(collector): capture additional smartctl diagnostics

Record host read and write commands, controller busy time, error log
entries, warning and critical temperature time, and thermal management
transitions from the existing smartctl -a -j acquisition. Schema 7 adds
nullable columns to samples so legacy rows read as unknown, and the
Diagnostics panel shows each counter with its change.

tests/test_issue_97.py

@@ -12,7 +12,7 @@ from fenris import collector
 from fenris.projection import compute_projection
 from fenris.status import _query_drive_facts, get_status, read_status
 from fenris.status_composition import render_status_tui
-from fenris.store import init_store
+from fenris.store import SCHEMA_VERSION, init_store
 
 
 class FakeClock:
@@ -288,7 +288,7 @@ def test_v3_readers_ignore_pending_table_until_store_migrates(tmp_path):
 
     migrated = init_store(store_path)
     try:
-        assert migrated.execute("PRAGMA user_version").fetchone()[0] == 6
+        assert migrated.execute("PRAGMA user_version").fetchone()[0] == SCHEMA_VERSION
         assert migrated.execute("SELECT COUNT(*) FROM pending_publications").fetchone()[0] == 0
     finally:
         migrated.close()