feat: log db client (#10087)

```
just log -h
if [ "${1:-}" = "--" ]; then shift; fi; cargo run -p codex-state --bin logs_client -- "$@"
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s
     Running `target/debug/logs_client -h`
Tail Codex logs from state.sqlite with simple filters

Usage: logs_client [OPTIONS]

Options:
      --codex-home <CODEX_HOME>  Path to CODEX_HOME. Defaults to $CODEX_HOME or ~/.codex [env: CODEX_HOME=]
      --db <DB>                  Direct path to the SQLite database. Overrides --codex-home
      --level <LEVEL>            Log level to match exactly (case-insensitive)
      --from <RFC3339|UNIX>      Start timestamp (RFC3339 or unix seconds)
      --to <RFC3339|UNIX>        End timestamp (RFC3339 or unix seconds)
      --module <MODULE>          Substring match on module_path
      --file <FILE>              Substring match on file path
      --backfill <BACKFILL>      Number of matching rows to show before tailing [default: 200]
      --poll-ms <POLL_MS>        Poll interval in milliseconds [default: 500]
  -h, --help                     Print help
  ```

codex-rs/Cargo.lock

@@ -1851,8 +1851,10 @@ version = "0.0.0"
 dependencies = [
  "anyhow",
  "chrono",
+ "clap",
  "codex-otel",
  "codex-protocol",
+ "dirs",
  "pretty_assertions",
  "serde",
  "serde_json",