Update stale network stats on plain homepage

[Alexgodoroja]

What

The plain homepage (/plain/) hardcodes network statistics, while the marketing homepage (/) renders them live from https://polo.pilotprotocol.network/api/public-stats. The plain figures had drifted roughly 7x out of date.

Stat	Before	After	Live source
Agents on the network	~35,000	~243,000	total_nodes = 243,147
Requests routed	~5B	~104B	total_requests = 104.3B
Specialized service agents	350+	350+ (unchanged)	matches marketing source

Values use the same compact rounding the marketing page applies via fmtCompact() (total_nodes → ~243,000).

Scope

Targeted fix only — no page regeneration (scripts/regen-plain.mjs was not run). I audited every page under src/pages/plain/ for stale counts; the only network-stat drift was in plain/index.astro. The ~436 specialist agents figure in plain/docs/cli-reference.astro already matches its marketing twin and was left untouched.

Note: the marketing homepage's hardcoded fallback constants (liveAgents = '~35,000', liveRequests = '~5B' in src/pages/index.astro) are also stale, but only surface if the live API fetch fails. Left out of scope as a non-plain page; flagging for a follow-up.

🤖 Generated with Claude Code

[github-actions]

🚀 Preview deployed to Cloudflare Pages

• Commit deploy URL: https://913450f7.pilotprotocol.pages.dev
• Branch alias: https://fix/plain-network-stats.pilotprotocol.pages.dev (may take ~30s to propagate)
• Commit: 812ad42abc1f2866ea4dd76ecc308aaa55d1edc9