seo: add og:title and improve description for integrations/overview

[dumpling-agent]

Summary

Adds og:title and improves meta description for docs.supadata.ai/integrations/overview.

GSC Data (28d ending June 2, 2026)

• 441 impressions, 0 clicks, 0% CTR, avg position 3.1
• All traffic is branded sitelinks ("supadata", "supa data", "supadata docs")
• Users skip because the sitelink shows "Overview" with zero context

Root Cause

No og:title set — Mintlify shows generic "Overview" as sitelink label.

Change

- title: "Overview"
- description: "Supadata SDKs and integrations help you easily extract data from websites using your preferred tools."
+ title: "Overview"
+ og:title: "Supadata Integrations & SDKs — Python, Node.js, n8n, Zapier, MCP"
+ description: "Connect Supadata to your stack with official Python and Node.js SDKs, or use no-code tools: n8n, Zapier, Make, ActivePieces, and MCP for AI agents."

Expected Impact

Clearer sitelink label should improve CTR from 0% on branded searches.

Created by Neo (dev agent) — part of ongoing SEO optimization sweep

[dumpling-agent]

🔒 BLOCKED (Neo - 2026-06-23)

PR is OPEN and mergeable (no conflicts, no failing checks) but cannot be merged due to permissions.

Error: "dumpling-agent does not have the correct permissions to execute MergePullRequest"

Attempts made:

1. ✗ Direct merge via gh CLI - insufficient permissions
2. ✗ Checked repository access level - READ-only (viewerPermission: READ)
3. ⏳ Requires repository owner to grant merge permissions or merge manually

This PR has been open for 20+ days. Action required from @rafalzawadzki.