feat: implement cross-chain asset support and bridge event verification

[nonchalanttee22-lgtm]

• Add source_chain and source_tx_hash metadata to Plan struct for tracking bridged asset origins
• Extend Beneficiary with destination_chain and destination_address for cross-chain payouts
• Implement BridgePayoutEvent struct for Allbridge messaging protocol compatibility
• Add admin-managed wrapped token registry with register/unregister/query functions
• Validate bridged assets correspond to supported wrapped tokens on Stellar
• Implement safe bridge fee deduction (1% BPS) with integer division
• Emit bridge payout events with gross/fee/net amounts for non-Stellar destinations
• Update all contract tests with new metadata fields and bridge parameters
• Pass acceptance criteria: metadata acceptance, event emission, safe fee deduction
• Closes [Contracts] Handle Cross-Chain Assets and Bridging Event Verification #849

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[ONEONUORA]

@nonchalanttee22-lgtm
Run cargo fmt --all -- --check

[ONEONUORA]

@nonchalanttee22-lgtm
Run cargo fmt --all -- --check
Diff in /home/runner/work/InheritX/InheritX/contracts/inheritance-contract/src/lib.rs:1:
#![no_std]
-use soroban_sdk::{contract, contracterror, contractimpl, contracttype, Address, Env, String, Symbol, Vec};
use soroban_sdk::{
contract, contracterror, contractimpl, contracttype, symbol_short, Address, Env, String, Vec,
};
Diff in /home/runner/work/InheritX/InheritX/contracts/inheritance-contract/src/lib.rs:6:
+use soroban_sdk::{

• contract, contracterror, contractimpl, contracttype, Address, Env, String, Symbol, Vec,
  +};

const MAX_BENEFICIARIES: u32 = 100;
const PLAN_TTL_THRESHOLD: u32 = 500;
Diff in /home/runner/work/InheritX/InheritX/contracts/inheritance-contract/src/lib.rs:98:
}

 fn emit_bridge_payout_event(env: &Env, event: &BridgePayoutEvent) {

•    let topic = (Symbol::short("BridgePayout"), env.current_contract_address());
  

•    let topic = (
  

•        Symbol::short("BridgePayout"),
  

•        env.current_contract_address(),
  

•    );
     env.events().publish(topic, event);
  

  }

[nonchalanttee22-lgtm]

on it

[nonchalanttee22-lgtm]

on it

[nonchalanttee22-lgtm]

done

[ONEONUORA]

@nonchalanttee22-lgtm
Run cargo fmt --all -- --check
Diff in /home/runner/work/InheritX/InheritX/contracts/inheritance-contract/src/lib.rs:1:
#![no_std]
use soroban_sdk::{

• contract, contracterror, contractimpl, contracttype, symbol_short, Address, Env, String, Symbol, Vec,

• contract, contracterror, contractimpl, contracttype, symbol_short, Address, Env, String,
• Symbol, Vec,
  };

const MAX_BENEFICIARIES: u32 = 100;

[nonchalanttee22-lgtm]

done, merge

[nonchalanttee22-lgtm]

@ONEONUORA

[ONEONUORA]

@nonchalanttee22-lgtm
Run cargo build --release