[P3.6] `cf stats` uses a hardcoded relative DB path (ignores cwd walk-up and `DATABASE_PATH`)

[frankbria]

Severity: low | Category: correctness | Phase: P3.6

Problem

_get_db() hardcodes .codeframe/state.db relative to cwd, so cf stats fails from any subdirectory of a workspace and ignores DATABASE_PATH, unlike every other command.

Evidence

codeframe/cli/stats_commands.py:50

Acceptance criteria

Resolves via get_workspace(Path.cwd()) walk-up and honors DATABASE_PATH.

Dependencies

None

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_{Filed from the SaaS launch-readiness audit. Atomic: one developer, one session. Work order: strictly P0.1 → P3.12 (no forward dependencies).}