David Li 3d0dd9b8b9 feat: migrate from eprintln! to tracing for structured logging ... - Add tracing + tracing-subscriber dependencies - Initialize tracing in main() with env-filter (RUST_LOG support) - Replace all eprintln! diagnostic messages with tracing macros: - info! for lifecycle events (daemon startup, cache hits, scan progress) - warn! for non-fatal errors (skipped DBs, scan limits, connection errors) - error! for fatal errors (daemon startup failure) - debug! for cache hits (hidden behind RUST_LOG=debug) - Add #[tracing::instrument] to key paths: - daemon::start_daemon — automatic startup timing - query::{sessions, history, search, new_messages} — per-query timing - crypto::full_decrypt — per-decrypt timing with page count - Keep println! for user-facing CLI output (YAML/JSON, status messages) - Keep eprintln! for test output and CLI progress indicators		2026-05-13 16:08:48 +08:00
..
write-gate-state.json.42664.1778654711903.55djvdvj7c5.tmp	feat: migrate from eprintln! to tracing for structured logging	2026-05-13 16:08:48 +08:00