feat: add organization-scoped contribution filtering

[sureshsuriya]

Description

Fixes #7483

This PR adds support for organization-scoped contribution filtering.

Summary

• Added an optional org query parameter to the GitHub and Wrapped API endpoints.
• Added validation for the org parameter.
• Updated the GitHub contribution fetching logic to support organization-scoped queries.
• Updated cache keys to include the organization filter and avoid cache collisions.
• Added unit and integration tests covering the new functionality while preserving existing behavior when org is not provided.

Pillar

• 🎨 Pillar 1 — New Theme Design
• 📐 Pillar 2 — Geometric SVG Improvement
• 🕐 Pillar 3 — Timezone Logic Optimization
• 🛠️ Other (Bug fix, refactoring, docs)

Visual Preview

N/A (API/backend feature with no visual UI changes)

Checklist before requesting a review:

• I have read the CONTRIBUTING.md file.
• I have tested these changes locally (localhost:3000/api/streak?user=YOUR_USERNAME).
• I have run npm run format and npm run lint locally and resolved all errors (CI will fail otherwise).
• My commits follow the Conventional Commits format (e.g., feat(themes): ..., fix(calculate): ...).
• I have updated README.md if I added a new theme or URL parameter.
• I have started the repo.
• I have made sure that I have only one commit to merge in this PR.
• The SVG output matches the CommitPulse "premium quality" aesthetic standard (no raw elements, smooth animations, correct fonts).
• (Recommended) I joined the CommitPulse Discord community for contributor discussions, mentorship, and faster PR support.

[vercel]

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[github-actions]

📦 Next.js Bundle Size Report (Gzipped Sizes)

Asset	PR Size	Base Size	Difference	Status
static/chunks/9389-[hash].js	6.80 KB	6.79 KB	+0.01 KB (+0.19%)	🔴 Regression

📊 Summary of Totals

Category	PR Size	Base Size	Difference
Total JS	3910.77 KB	3910.49 KB	+0.28 KB (+0.01%)
Total CSS	326.92 KB	326.92 KB	0 B

[Aamod007]

Great work implementing organization-scoped contribution filtering! Updating the GraphQL queries to use organizationID, resolving the Node ID correctly, and safely adjusting the cache keys to prevent collisions were all handled perfectly. The tests look solid too. Approved!

[github-actions]

🎉 Congratulations @sureshsuriya! Your PR has been successfully merged. 🚀

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