docs(site): point cA2A links at the live ca2a.agentrust-io.com (#6)

The cA2A docs site is live at https://ca2a.agentrust-io.com (GitHub Pages,
custom domain, HTTPS). Switch the product card, supernav, JSON-LD, and llms.txt
from the GitHub repo to the subdomain, and flip the card badge from Preview to
Live to match the other three standards.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: imran-siddique

index.html

@@ -98,7 +98,7 @@
         "item": {
           "@type": "TechArticle",
           "name": "Confidential A2A (cA2A)",
-          "url": "https://github.com/agentrust-io/ca2a",
+          "url": "https://ca2a.agentrust-io.com/",
           "description": "A trust profile on the Agent2Agent (A2A) protocol that makes agent-to-agent delegation verifiable and confidential: attested, attenuated delegation, a sealed peer channel, and an offline-verifiable provenance record for every hop."
         }
       }
@@ -582,9 +582,9 @@
       <span class="nav-dot" style="background:#6D28D9;"></span>
       cmcp
     </a>
-    <a href="https://github.com/agentrust-io/ca2a">
+    <a href="https://ca2a.agentrust-io.com">
       <span class="nav-dot" style="background:#0D9488;"></span>
-      ca2a ↗
+      ca2a
     </a>
     <a href="https://governance.agentrust-io.com">
       <span class="nav-dot" style="background:#EA580C;"></span>
@@ -671,17 +671,17 @@ <h1>Govern AI Agents<br>at the Hardware Boundary</h1>
     </a>
 
     <!-- cA2A -->
-    <a href="https://github.com/agentrust-io/ca2a" class="product-card">
+    <a href="https://ca2a.agentrust-io.com" class="product-card">
       <div class="card-accent" style="background: #0D9488;"></div>
       <div class="card-body">
         <div class="card-tag" style="color: #0D9488;">Delegation Profile</div>
         <div class="card-name">Confidential A2A</div>
         <div class="card-desc">A trust profile on the Agent2Agent (A2A) protocol. Adds attested, attenuated delegation, a sealed peer channel, and an offline-verifiable provenance record for every hop — so agent-to-agent delegation is verifiable and confidential, not just authenticated at the front door.</div>
       </div>
       <div class="card-footer">
-        <span class="card-url">github.com/agentrust-io/ca2a</span>
+        <span class="card-url">ca2a.agentrust-io.com</span>
         <div style="display:flex;gap:0.5rem;align-items:center;">
-          <span class="card-badge badge-preview">Preview</span>
+          <span class="card-badge badge-live">Live</span>
           <svg class="card-arrow" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7"/></svg>
         </div>
       </div>

llms.txt

@@ -9,7 +9,7 @@ AgenTrust is organized around four complementary open standards. Agent Manifest
 - [TRACE](https://trace.agentrust-io.com): Transparent Runtime Attestation for Confidential Execution. Hardware-rooted cryptographic receipts for every agent action, signed by the TEE and verifiable by anyone.
 - [Agent Manifest](https://manifest.agentrust-io.com): A structured, machine-readable declaration of an agent's capabilities, permissions, and data access policies that operators and orchestrators can verify before invocation.
 - [Confidential MCP (cMCP)](https://cmcp.agentrust-io.com): An extension to the Model Context Protocol that runs tool calls inside a Trusted Execution Environment so the host process cannot observe inputs, outputs, or intermediate state.
-- [Confidential A2A (cA2A)](https://github.com/agentrust-io/ca2a): A trust profile on the Agent2Agent (A2A) protocol, not a competing transport. Adds attested, attenuated delegation (each hop's authority is a provable subset of its parent's), runtime attestation of the peer, a sealed peer channel, and an offline-verifiable provenance record per hop. Developer preview.
+- [Confidential A2A (cA2A)](https://ca2a.agentrust-io.com): A trust profile on the Agent2Agent (A2A) protocol, not a competing transport. Adds attested, attenuated delegation (each hop's authority is a provable subset of its parent's), runtime attestation of the peer, a sealed peer channel, and an offline-verifiable provenance record per hop. Developer preview.
 
 ## Docs and machine-readable summaries