Implement transaction simulation before execution in VaultModule.deposit

[Code-Paragon]

Problem

The deposit method in src/modules/vault.ts constructs and submits the transaction immediately without simulating it first, as noted by an existing TODO, which could lead to failed transactions consuming network fees.

Expected behavior

The deposit method calls simulateTransaction on the built operation first. If the simulation fails, it throws a descriptive error before prompting the user for a signature.

Files to update

• src/modules/vault.ts

Project relevance

This protects Liquidity Providers from paying network fees for transactions that will inevitably revert due to slippage or insufficient funds.

Acceptance criteria

• Feature works as described
• Tests are added or updated where needed
• Documentation is updated where needed
• Simulation response is validated using rpc.Api.isSimulationSuccess before buildAndSubmit is called
• No TypeScript, lint, test, or build errors