1.7.0-RC1

• ⭐ Add outstation ConnectionManager with fine-grained connection control for TCP and TLS clients. See #381, #406.
  • New Rust API: spawn_outstation_tcp_client_2() and spawn_outstation_tls_client_2() functions with ClientConnectionHandler trait
  • New FFI API: outstation_create_tcp_client_with_handler() and outstation_create_tls_client_with_handler() functions
  • Provides dynamic endpoint selection, custom retry logic, connection lifecycle notifications, and DNS resolution handling
  • Per-connection master address override via ConnectionInfo::set_master_address() for failover scenarios
• ⭐ Add DirectWriteAbsTime time sync procedure for non-conformant outstations. See #403.
  • Writes Group 50 Var 1 directly without delay measurement for outstations that don't properly implement IEEE-1815 time sync
• ⭐ Add optional support for parsing and transmission of zero-length octet strings via global setting. See #379.
• ⭐ Add optional support for AWS libcrypto (aws-lc-rs) as TLS backend. See #378.
• ⭐ Make OctetString constructor public in Java bindings. See #402.
• ⭐ Make HeaderInfo constructor public for mockability in tests. See #404.
• 🛡️ Add security policy and automated supply chain scanning. See #394.
• 🔧 Add quality gate to prevent releases when tests fail. See #393.
• 🔧 Automate cargo publish to crates.io in CI release process. See #407.
• 🔧 Better CLI examples with improved organization and documentation. See #375.
• 🔧 Refactor release workflow into separate idempotent jobs for improved reliability.
• 📖 Update TLS documentation to clarify empty string behavior for certificate passwords and improve grammar. See #389.