chore(domain): yourplatform.com → breakpilot.com

Apply the platform-domain decision (2026-05-18) to every manifest,
overlay, DNS template, README, and script in this repo.

Refs: M1.1

dns/yourplatform.com.zone.template

@@ -1,11 +1,11 @@
-; PowerDNS authoritative zone for yourplatform.com.
+; PowerDNS authoritative zone for breakpilot.com.
 ; Source-of-truth: this file. Synced into PowerDNS by M0.3 deploy step.
 ; Real records (apex, wildcards, A, MX, SPF/DKIM/DMARC) land with M0.3.
 
-$ORIGIN yourplatform.com.
+$ORIGIN breakpilot.com.
 $TTL 60
 
-@   IN  SOA  ns1.yourplatform.com. oncall.yourplatform.com. (
+@   IN  SOA  ns1.breakpilot.com. oncall.breakpilot.com. (
         ; serial — bumped by CI on every commit
         2026051800
         3600        ; refresh
@@ -14,7 +14,7 @@ $TTL 60
         60          ; minimum TTL
 )
 
-@   IN  NS   ns1.yourplatform.com.
-@   IN  NS   ns2.yourplatform.com.
+@   IN  NS   ns1.breakpilot.com.
+@   IN  NS   ns2.breakpilot.com.
 
 ; A records, wildcards, mail/spf/dkim/dmarc land in M0.3