[PeerX Backlog # 52] Add rustdoc on every public entry point

[ameeribro4-sudo]

Problem Statement
Public functions in lib.rs and trait methods (CallRegistry,
PoolRegistry) have inconsistent rustdoc. Many have none. cargo doc --no-deps --open shows blank pages.

Expected Outcome
Every public entry point and module has a /// block referencing:

• the unit tests it has,
• the events it emits,
• the errors it can return,
• the cross-references (called by / calls).

Acceptance Criteria

• cargo doc --no-deps renders 100% pages.
• Sections per function: # Errors, # Events, # Panics.
• A new #![deny(missing_docs)] attribute is added at the top of
  lib.rs (it is not present today — verify with
  grep -n 'deny(missing_docs)' peerx-contracts/counter/src/lib.rs).
• cargo doc --no-deps produces zero warnings after the attribute is set.

Files Affected

• All peerx-contracts/*/src/*.rs.

Dependencies Issue #21.
Difficulty / Effort 🥈 / XL
Labels documentation

[GBOYEE]

Hi team — I'd like to take this on as part of the GrantFox campaign. I'll write the documentation and open a PR referencing this issue shortly.

[Primex-hub]

I would love to solve this issue

[sanusishafii989]

Hi maintainers!

I would love to take on this issue as part of the GrantFox FWC26 campaign.

I am already familiar with the Peerx-Contracts workspace layout and Rust documentation standards. I will systematically document all public entry points and trait methods across all contracts to ensure complete coverage:

Add crate-level lint: Prepend #![deny(missing_docs)] to the entry files (e.g., lib.rs) to ensure zero undocumented public items remain.

Structured Rustdoc: Ensure every public function and trait method includes standardized sections detailing # Errors, # Events, # Panics, and cross-references.

Verification: Run cargo doc --no-deps to verify that the documentation builds completely warning-free and renders full pages.

I am ready to begin immediately and deliver a clean, comprehensive PR. Please assign this issue to me!

[grantfox-oss]

🦊 GrantFox — @sanusishafii989 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 #52)
2. Your PR will be reviewed by the OpenPeerX 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!

@sanusishafii989's PR #121 was approved and merged by @ameeribro4-sudo.

🏆 @sanusishafii989: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (226 total points). Track your full progress on GrantFox.

👏 Great work, @sanusishafii989! Keep contributing to OpenPeerX.