v0.2.13: Miscellaneous polishing

Added

• Wrote some basic developer documentation to supplement the justfiles.
• Allow specifying --falconerid-log-level for falconeri deploy. This uses standard RUST_LOG syntax, as described in the CLI help.

Fixed

• Cleaned up tracing output a bit.
• Switched to using rustls for HTTPS. Database connections still indirectly require OpenSSL thanks to libpq.