v0.2.0

Highlights

ironfix-session — acceptor-side sessions and checked sequence counters (#1)

• New LogonReceived typestate with the full acceptor path: Disconnected::accept() → Connecting::on_logon_received() → accept_logon() / reject_logon() / on_timeout(), so FIX servers can express their state machine with the provided typestate.
• SequenceManager::try_allocate_sender_seq() and try_increment_target_seq() return Result<SeqNum, SequenceExhausted> instead of silently wrapping on u64 overflow. Reset semantics documented (ResetSeqNumFlag(141)=Y + reset()).
• Session and the new types are now exported from the crate root.

ironfix-dictionary — embedded FIX 4.4, XML loader, validator (#2)

• Dictionary::fix44(): the standard QuickFIX FIX 4.4 specification embedded at compile time, parsed once and cached (&'static Dictionary).
• Dictionary::from_quickfix_xml(): loader for QuickFIX-format XML so venue-specific dialects can extend the base.
• Validator: validates a decoded message against a dictionary — known message type, tags defined/allowed for the message, required header/body/trailer fields with recursive component expansion, enum values, and repeating-group count/delimiter consistency.

Breaking changes

• ironfix-dictionary: Dictionary gains header_groups/trailer_groups and GroupDef gains components — breaking for downstream struct-literal construction (hence 0.2.0).

All 11 crates published to crates.io at 0.2.0.