Feature Request — ROI Analytics & Campaign Performance Dashboard

### Is your feature request related to a problem?

- [x] Yes, it is related to a problem

### Describe the feature you'd like

## 🌟 Feature Description
Build a complete ROI Analytics Dashboard that allows brands and creators to track campaign performance, visualize engagement metrics, and compare expected vs. actual ROI.

This feature will include real-time data visualization (CPM, CPC, CTR, Engagement rate), performance insights, and FastAPI endpoints to support analytics.

## 🔍 Problem Statement

Currently, InPactAI allows creator-brand matchmaking and sponsorship management but lacks post-campaign performance measurement.

Brands cannot validate their marketing ROI, and creators have no way to showcase campaign effectiveness, reducing trust and platform value.

##Missing capabilities:

1.No campaign performance tracking .
2.No visual engagement analytics (CTR, CPM, audience reach, ROI).
3.No insight-based recommendations for future campaigns.

## 🎯 Expected Outcome
A functional Analytics Dashboard that:

1. Displays engagement metrics (likes, shares, comments, impressions)
2. Calculates and visualizes CPM, CPC, CTR, engagement rate, ROI
3. Compares expected vs. actual results (budget vs reach)
4. Supports FastAPI endpoints: /analytics/campaign/{id}, /analytics/creator/{id}
5. Provides brand & creator impact reports (optional: AI insights)

### Record

- [x] I agree to follow this project's Code of Conduct
- [x] I want to work on implementing this feature