fix: repair sitemap Mongo source fallback for blog URLs

[princepspolycap]

Problem

https://www.princepspolycap.com/sitemap-0.xml is missing /blogs/* URLs in production. Current output only contains static routes.

Root Cause

next-sitemap.config.js only reads process.env.MONGODB_URI, while runtime code paths in this repo use MONGODB_DATABASE_URL (and optional DB name envs). In deploy contexts where only MONGODB_DATABASE_URL is set, sitemap blog query returns no rows.

Changes

• Updated sitemap config to resolve Mongo URI from either MONGODB_DATABASE_URL or MONGODB_URI.
• Added optional DB name resolution from MONGODB_DB_NAME or COSMOS_DB_DATABASE_NAME during sitemap DB connect.
• Expanded publish filter to include both models:
  • { status: "published" }
  • { isPublished: true }

File changed

• next-sitemap.config.js

Testing (compute sandbox)

• npm install
• npm run build
• Confirmed next-sitemap runs successfully in postbuild.
• Baseline check (public): current sitemap-0.xml still has 4 URLs before this PR deploy.

Notes

• Canonical + OG metadata are already present in src/app/blogs/[slug]/page.js.
• After merge, deployment must complete, then validate public sitemap and submit to GSC/Bing.

[github-actions]

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