docs: sync module interfaces with actual code

[sewqasreedas]

Changes:

• x/bank: Updated SendKeeper and Keeper interfaces (added missing methods, fixed signatures)
• x/staking: Added BeforeValidatorSlashed hook, fixed hook order
• x/mint: Fixed InflationCalculationFn signature (sdk.Context → context.Context)
• x/epochs: Fixed EpochHooks signature (sdk.Context → context.Context, added error return)
• x/auth: Fixed AccountKeeperI signature (context type, added missing methods)
• x/upgrade: Fixed UpgradeHandler signature (Context → context.Context, VersionMap → module.VersionMap)

[aljo242]

Can you share your methodology for this?

[sewqasreedas]

Opened README files in x/ modules, then grep'd for the actual interface definitions in keeper/.go and types/.go. When the signatures didn't match — wrong context type, missing methods, etc — I updated the docs to match what's actually in the code.

[aljo242]

Could you add a script that helps us do that so that we can repeat this process in the future?

[sewqasreedas]

Sorry, spent some time on this but the results were too noisy to be useful. Probably better to keep it manual for now.