SEO: improve /blog/ title, meta description, and intro for CTR

[philip638]

Page: /blog/

Before (GSC, 28d): 1090 impressions / 0 clicks / avg position 26.8 — ranks, but the snippet loses the click.

What changed:

• Title: Blog - Pilot Protocol → AI Agent Networking Blog | Pilot Protocol (front-loads the topic).
• Meta description: rewritten to state the concrete deliverable (P2P communication, NAT traversal, trust models, app store guides with real pilotctl commands), 141 chars.
• Matching CollectionPage JSON-LD name/description updated to stay consistent.
• H1 + subtitle rewritten to answer "what is this blog about" in the first two sentences.
• Added a short internal-links line pointing to 3 existing cornerstone posts (agent discovery over P2P, peer-to-peer agent communication, app store intro) to strengthen topical relevance signals.
• URL/slug unchanged.

No body/substance rewrite — snippet-and-structure pass only, per the CTR-harvest playbook.

npm run build and npm run check:plain both pass.