Bug Report: Fix E2E Tests for ERD Schema Refactor Compatibility

[NahomAlemu]

Describe the Bug

The ERD schema refactor introduced breaking changes that caused E2E test failures. This issue tracks the fixes needed for test compatibility.

Root Causes:

1. Backend renamed eventTags to tagNames in CreateActivityDto
2. Delete event endpoint changed from DELETE /events/:id to DELETE /events/remove/:id

Changes needed:

• Update e2e/utils/api-client.ts - Fixed delete endpoint path
• Update e2e/tests/event-management.spec.ts - Change eventTags to tagNames in all API calls

Additional Optimization:

• Implemente tiered E2E testing strategy to reduce CI pipeline time
• Add @smoke tags to critical tests for quick validation on non-critical PRs
• Add test sharding for parallel execution on full suite runs

Steps to Reproduce

E2E test fails during PR and locally.

Expected Behavior

• All smoke tests pass locally
• Full E2E suite passes in CI
• Pipeline completes in reasonable time

Visual Aids

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Desktop or Mobile Info

No response

Related Issues

PR #142

Additional Context

No response