feat: add governance and related events to custom modules

[Thaleszh]

Description

• Emit update_params, fund_pool, change_schedule, and reward_distributed events from x/rewards
• Emit update_params and set_denom_metadata events from tokenfactory
• Emit update_params, update_fee_tokens, module_disabled and token_disabled events on fee abstraction
• Emit update_params event on oracle module

Type of change

• New feature (non-breaking change which adds functionality)

PR Checklist:

Make sure each step was done:

• Updated changelog with PR's intent
• Lint with make lint-fix

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 10d6772c-b14c-40fa-8dbc-e84035abf486

📥 Commits

Reviewing files that changed from the base of the PR and between 6afcfe5 and 5a3855b.

📒 Files selected for processing (2)

• CHANGELOG.md
• wasmbinding/tokenfactory/message_plugin.go

Walkthrough

This PR adds Cosmos SDK event emissions across multiple modules to track state transitions. Event type and attribute constants are introduced in respective types packages, with x/rewards/types/events.go being a new file. Event emissions are added to keeper methods throughout the codebase: UpdateParams operations emit update_params events; rewards operations emit fund_pool, change_schedule, and reward_distributed events; fee abstraction operations emit update_fee_tokens, module_disabled, and token_disabled events; and the token factory SetMetadata operation emits a set_denom_metadata event. The CHANGELOG documents these additions.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~15 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The pull request title 'feat: add governance and related events to custom modules' accurately describes the main change: adding event emissions across multiple custom modules.
Description check	✅ Passed	The pull request description is directly related to the changeset, providing a clear breakdown of which events are emitted from each module.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/emit-events

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[Thaleszh]

@copilot resolve the merge conflicts in this pull request

[codecov]

Codecov Report

❌ Patch coverage is 10.00000% with 45 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
x/rewards/keeper/msg_server.go	0.00%	12 Missing ⚠️
x/feeabstraction/keeper/oracle.go	0.00%	11 Missing ⚠️
wasmbinding/tokenfactory/message_plugin.go	0.00%	7 Missing ⚠️
x/feeabstraction/keeper/msg_server.go	0.00%	7 Missing ⚠️
x/rewards/keeper/abci.go	0.00%	5 Missing ⚠️
x/tokenfactory/keeper/msg_server.go	0.00%	3 Missing ⚠️

📢 Thoughts on this report? Let us know!