Update - Upgrade Astro to 7.2 and remove unused session KV binding

[markmead]

Summary

• Bumps astro 7.0.3 → 7.2.3 and @astrojs/mdx 7.0.0 → 7.0.6 (the newest patch versions available given pnpm's minimumReleaseAge policy — 7.2.4/7.0.7 were published within the last 24h)
• Fixes an existing peer dependency mismatch: the installed @astrojs/cloudflare@14.2.2 already declares peerDependencies: { astro: "^7.2.0" }, which astro@7.0.3 violated
• Removes the unused SESSION KV binding from wrangler.jsonc — nothing in src calls Astro.session
• Regenerates worker-configuration.d.ts accordingly
• Skips the new experimental.incrementalBuild flag from 7.2 for now — it's still pre-stable, its benefit depends on the build cache persisting across Cloudflare Pages builds (unconfirmed), and the current build is already ~4s for all 88 pages, so there's no bottleneck it would solve

Supersedes #739 (Dependabot's astro 7.1.1 bump).

Test plan

• pnpm run check — 0 errors
• pnpm build — clean, 88 pages built
• pnpm lint — clean
• pnpm test — 114 passed, 6 skipped, 0 failed

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR updates the site’s build/runtime dependencies to align with the currently installed @astrojs/cloudflare peer requirements, and removes an unused Cloudflare Workers KV binding from the Wrangler configuration (with regenerated Wrangler type output to match).

Changes:

• Bump astro from 7.0.3 to 7.2.3 and @astrojs/mdx from 7.0.0 to 7.0.6, updating the lockfile accordingly.
• Remove the unused SESSION KV namespace binding from wrangler.jsonc.
• Regenerate worker-configuration.d.ts so the Env interface reflects the current Wrangler bindings (dropping SESSION).

Reviewed changes

Copilot reviewed 2 out of 4 changed files in this pull request and generated no comments.

File	Description
wrangler.jsonc	Removes the unused SESSION KV binding from the Worker configuration.
worker-configuration.d.ts	Regenerated Wrangler types; Env no longer includes SESSION and runtime typings are updated.
package.json	Updates astro and @astrojs/mdx dependency versions.
pnpm-lock.yaml	Updates the dependency graph/lock state to match the new Astro + MDX versions.

Files not reviewed (1)

• pnpm-lock.yaml: Generated file

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