chore: Add more tests

[peculiarity]

No description provided.

[github-actions]

Coverage after merging gg/test/more-test-to-check-auth-modifier into main will be

95.93%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
src
Auth.sol	100%	100%	100%	100%
CentrifugeRouter.sol	89.86%	41.67%	96.43%	93.52%	107, 107, 202, 202, 31, 316, 32–33, 35–36, 41, 48, 76–77
ERC7540Vault.sol	97.40%	100%	95.65%	98.11%	275, 417
Escrow.sol	75%	100%	66.67%	71.43%	29–30
InvestmentManager.sol	95.13%	92.86%	90.70%	96.70%	225, 234, 358, 38–39, 41–42, 568–569
PoolManager.sol	91.67%	88.24%	80.77%	94.23%	160, 162, 162, 162–163, 165, 320, 343, 56–58, 60–61
Root.sol	95.45%	87.50%	92.86%	97.73%	119, 124
src/admin
Guardian.sol	100%	100%	100%	100%
src/factories
ERC7540VaultFactory.sol	100%	100%	100%	100%
TrancheFactory.sol	100%	100%	100%	100%
TransferProxyFactory.sol	100%	100%	100%	100%
src/gateway
GasService.sol	100%	100%	100%	100%
Gateway.sol	93.02%	82.61%	94.12%	96.05%	117, 153, 221, 226, 271, 288, 297, 45–48, 50–51, 66
src/gateway/adapters/axelar
Adapter.sol	100%	100%	100%	100%
Forwarder.sol	77.78%	100%	75%	75%	30, 32–33
src/token
ERC20.sol	97.62%	91.67%	100%	98.33%	69–70
RestrictionManager.sol	96.61%	91.67%	100%	97.22%	94–95
Tranche.sol	88.24%	75%	83.33%	93.10%	144, 152, 157