The early portion of __checkpoint_db_internal handles setup that is logically distinct from the core checkpoint execution. This includes:

• Resetting per-checkpoint statistics
• Initializing timers and progress tracking

This makes the function harder to read and contributes to a higher LOC and cyclomatic complexity. The aim of this ticket is to create a helper function that isolates the setup phase, making the __checkpoint_db_internal easier to follow and reducing the LOC and cyclomatic complexity.

Proposed Approach

Create a new static _checkpoint_init helper in. Move the init block into the new function. This is a pure refactor, no checkpoint behavior changes.

Definition of Done

• _checkpoint_init helper exists and is called from _checkpoint_db_internal
• Existing tests pass