fix(#430): per-account authorized_controller in AccountInitRequest

[abdoolyaro]

• AccountInitRequest now carries authorized_controller so batch_initialize can wire each account to a distinct controller (e.g. a real SweepController instance) instead of hardcoding creator
• fixes [MEDIUM] No integration test exercises the full create -> fund -> sweep pipeline across all three live contracts together #431: account_factory/src/test.rs was never wired into the crate (missing mod test declaration and a cfg(test) gate), so its tests including the existing e2e pipeline test for [MEDIUM] No integration test exercises the full create -> fund -> sweep pipeline across all three live contracts together #431 silently never ran
• fixes an invalid checksum on the hardcoded admin placeholder address that broke every batch_initialize call once the test module was actually wired in
• fixes a u32 underflow and an Option-as-u32 cast bug in src/test.rs, both latent in code that had never compiled before
• adds test_batch_initialize_wires_distinct_authorized_controller_per_request as a direct regression test for the controller-hardcoding bug

closes #430
closes #431

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