caddy: fix /home2,/home3 redirect (redir destination, not a path matcher)

`redir / permanent` mis-parsed — Caddy read the leading `/` as a path matcher and
`permanent` as the destination, so it only matched `/` and emitted a broken 302 to
"permanent". Use an explicit destination URL (matching the www→apex idiom):
`redir https://upbeatbytes.com/ permanent`. Live Caddy reloaded; snapshot mirrored.
Verified: /home2,/home3,/home3.html → 301 → /.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

deploy/caddy/Caddyfile.snapshot

@@ -49,7 +49,7 @@ upbeatbytes.com {
 	@oldhome path /home2 /home2.html /home3 /home3.html
 	handle @oldhome {
 		redir https://upbeatbytes.com/ permanent
-	}
+	}
 
 	# Dynamic API + server-rendered pages (share, digest, sitemap) → FastAPI.
 	@api path /api/* /healthz /docs /docs/* /openapi.json /a/* /today /sitemap.xml