Use the known cargo build output path instead of current_exe() when
re-execing after a rebuild. In Docker, the running binary lives at
/usr/local/bin/storkit (read-only) while cargo writes the new binary
to /app/target/release/storkit (a writable volume), so current_exe()
would just restart the old binary.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>