[Postmortem / lessons-learned] bridgelet-audit/postmortems/account-factory-salt-collision.md: AccountFactory's colliding deployment salts

[phertyameen]

Postmortem / lessons-learned: bridgelet-audit/postmortems/account-factory-salt-collision.md

Purpose:
Write a knowledge-base article walking through why index-based salts collide across separate batch_initialize calls.

This file should cover:

• Explain deterministic address derivation in accessible terms before getting into the specific bug.
• Walk through a concrete worked example: two separate calls, same salt space, second one's index-0 deploy failing.
• Close with general guidance on salt design for any future contract that does programmatic deployment.

Scope: documentation-only addition to a new, standalone folder. No changes to contracts/, docs/, scripts/, or tools/ are needed to close this issue.

---

Part of the bridgelet-audit/ knowledge-base initiative (59/100).

[Glam26]

Hi! I'm interested in working on this.

I'll begin by reviewing the affected modules to understand the existing control flow, state transitions, and any external dependencies involved. After identifying the appropriate integration point, I'll implement the requested functionality while preserving existing contracts and minimizing behavioral regressions. I'll also expand the test coverage to include success paths, failure scenarios, and relevant edge cases, then validate the implementation against the project's linting, testing, and build pipeline before submitting a PR.

[grantfox-oss]

🦊 GrantFox — @Glam26 has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #310)
2. Your PR will be reviewed by the bridgelet-org maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign | FWC26 campaign!

@Glam26's PR #446 was approved and merged by @phertyameen.

🏆 @Glam26: You earned 40 FoxPoints for this contribution! Your current tier: Builder (1,567 total points). Track your full progress on GrantFox.

👏 Great work, @Glam26! Keep contributing to bridgelet-org.