Titan Integration

[josh-orca]

• Added the titan-integration crate (xORCA Titan Interface SDK) and the integration-template helper crate to swap (stake) through xORCA via Titan’s trading-venue interfaces.
• Added integration tests (test_construction, test_quoting, simulations) on LiteSVM to validate venue construction, quoting correctness, bounds, and swap behavior without on-chain mutations.
• Simulation harness now resolves the xORCA program binary from target/deploy/xorca_staking_program.so, with an XORCA_PROGRAM_SO override for custom paths; accounts are seeded in LiteSVM with large balances for deterministic quotes.
• Kept template/SDK deps on Solana 2.2.x with litesvm 0.6.x; the crate is excluded from the root workspace to avoid version conflicts with the main SDK.

Testing

• To execute:
  • Build the on-chain program: cargo build-sbf --manifest-path solana-program/Cargo.toml (produces target/deploy/xorca_staking_program.so), or set XORCA_PROGRAM_SO to the binary path.
  • Set env: SOLANA_RPC_URL=<rpc> for integration tests.
  • From titan-integration/: run cargo test --test test_construction, cargo test --test test_quoting, or the simulation tests after the binary is available.