Operations may not handle nil sessions map after Close()

[e-gineer]

Description

After Close() sets c.sessions = nil, any operation that tries to access the sessions map will access a nil map. While Go allows reading from a nil map, the pattern is fragile.

Severity

LOW - Fragile code pattern

Test Reference

Test: TestDbClient_SessionsMapNilAfterClose in pkg/db/db_client/db_client_test.go:388 (skipped)

Suggested Fix

All session access should check if the map is nil.

Related Code

• Multiple session access points in pkg/db/db_client/