Kara 0.2.4

Fixes scheduled task Codex timeouts observed on the daily data update task.\n\n- Adds tested scheduled-task execution guardrails so file-based tasks first check only Desktop/Documents/Downloads for today/yesterday Excel/CSV/TSV files and stop quickly when inputs are missing.\n- Avoids broad home-folder scans and spreadsheet/Python workflows before a current source file is confirmed.\n- Preserves the last CLI output on timeout so future failures show where the agent got stuck.\n\nCommand validation: the guarded Codex command completed successfully in 24s and returned a clear missing-data response.\n\nSHA256: f2adca5d9a5664d5be7c8585530fb9f781201ab6f08d6fed1923e78342fe57f7