[contract] Move lib.rs and market tests into integration suites

[Jay-Peter-Egemasi]

Description

Moves the remaining inline contract tests out of lib.rs and market.rs into dedicated integration test files, while adding coverage for config fee validation, leaderboard ties, and duplicate market outcomes.
Closes #324
Closes #326

Changes proposed

What were you told to do?

Combine the contract testing refactors for issues #324 and #326 into one PR by moving the inline lib.rs and market.rs tests into contract/tests/, adding one new test per requested suite, updating imports, removing the inline test blocks, and running the contract tests.

What did I do?

Test Suite Migration

• Moved the lib.rs config tests into contract/tests/config_tests.rs.
• Moved the lib.rs leaderboard tests into contract/tests/leaderboard_tests.rs.
• Moved the market.rs test suite into contract/tests/market_tests.rs and removed the unused contract/src/market_tests.rs file.
• Removed the inline #[cfg(test)] blocks from contract/src/lib.rs and contract/src/market.rs.

New Coverage And Validation

• Added test_config_update_validation to verify invalid protocol fee updates are rejected and existing config remains unchanged.
• Added test_leaderboard_tie_handling to verify equal-point entries are preserved and readable through season point lookups.
• Added test_create_market_with_duplicate_outcomes and implemented duplicate-outcome validation in market creation.
• Exposed calculate_price for the moved market tests and added protocol fee validation used by the new config coverage.

Check List (Check all the applicable boxes)

• My code follows the code style of this project.
• This PR does not contain plagiarized content.
• The title and description of the PR is clear and explains the approach.
• I am making a pull request against the main branch (left side).
• My commit messages styles matches our requested structure.
• My code additions will fail neither code linting checks nor unit test.
• I am only making changes to files I was requested to.

Screenshots / Testing Evidence

Validated with cargo test --manifest-path contract/Cargo.toml --test config_tests, cargo test --manifest-path contract/Cargo.toml --test leaderboard_tests, cargo test --manifest-path contract/Cargo.toml --test market_tests, and a full cargo test --manifest-path contract/Cargo.toml pass.

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Project	Deployment	Actions	Updated (UTC)
insight-arena-4rll	Ready	Preview, Comment	Mar 29, 2026 1:54pm

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