Soroban test suite fails due to removed Address::random API in soroban-sdk v22

[samjay8]

Title: fix: Soroban test suite fails due to removed Address::random API in soroban-sdk v22

Labels: bug, backend, testing, priority-high

Description:
The vaultlink-invoice-registry contract test suite fails to
compile because the test file uses Address::random(&env),
which no longer exists in soroban-sdk v22.0.11.

This causes the contract tests to fail during compilation before
any test execution occurs.

Error:

error[E0599]: no function or associated item named `random`
found for struct `soroban_sdk::Address` in the current scope

--> test.rs:15:31

15 | let originator = Address::random(&env);
|                               ^^^^^^

The SDK upgrade introduced breaking API changes and removed
Address::random, but the tests still rely on the old API.

Additional warnings were also emitted:

• unused imports (Invoice, Symbol)
• deprecated Env::register_contract usage

This is a critical issue because contract tests are currently
unable to compile or run, leaving invoice registry functionality
untested.

What Needs to Be Done:

Option A — Replace Address::random with generated test accounts (preferred):

• Open test.rs

• Replace:

  let originator = Address::random(&env);

• With a valid Soroban SDK v22-compatible address generation
  approach, such as:

  let originator = env.accounts().generate();

  or another officially supported testing utility

• Verify all tests using random addresses are updated

• Ensure generated addresses are properly authorized in tests

Option B — Downgrade soroban-sdk to a compatible version:

• If the project intentionally depends on older APIs,
  downgrade soroban-sdk to a version where
  Address::random still exists
• Ensure all Soroban-related dependencies remain version-aligned
• Rebuild and rerun tests after downgrade

Additional Cleanup:

• Replace deprecated:

  env.register_contract(None, InvoiceRegistryContract);

  with:

  env.register(...)

• Remove unused imports:

  Invoice
  Symbol

Whichever option is chosen must keep all Soroban dependencies
consistent across the workspace to avoid SDK compatibility issues.

Key Files:

• test.rs
• Cargo.toml
• Workspace Cargo.toml (if using workspace dependencies)
• Any shared Soroban contract testing utilities

Acceptance Criteria:

• cargo test runs without compilation errors
• All invoice registry contract tests execute successfully
• No deprecated Soroban SDK APIs remain in test files
• No unused import warnings remain
• Soroban SDK versions are consistent across the workspace
• Existing passing tests continue to pass

Branch: fix/soroban-address-random-sdk-v22

Commit:

fix(test): replace removed Address::random API and update Soroban v22 test compatibility