add templating doc in webhook form

templates/webhook_form.html

@@ -81,18 +81,18 @@
                             <label for="content" class="form-label">Content Template (JSON)</label>
                             <textarea class="form-control" id="content" name="content" rows="5" placeholder='{"key":"value", "attestation":{attestation_details}}'>{% if webhook and webhook.content %}{{ webhook.content }}{% else %}{"attestation":{attestation_details}}{% endif %}</textarea>
                             <small class="form-text text-muted">
-                                <b>Templating:</b> You can use variables in the form <code>"--varname--"</code> (double quote, two dashes, name, two dashes, double quote) anywhere in the URL, headers, or content.<br>
+                                <b>Templating:</b> Use variables in the form <code>--varname--</code> (two dashes, name, two dashes) anywhere in the URL, headers, or content.<br>
                                 <b>Supported variables:</b>
                                 <ul>
-                                    <li><code>secret</code>, <code>product-key</code>, <code>product-version</code>, <code>attestation_details</code></li>
-                                    <li><code>raw_attestation</code>, <code>attestation_json</code>, <code>attestation_predicate</code>, <code>attestation_predicate_b64</code> (loads attestation from storage only if used)</li>
+                                    <li><code>product-key</code> (product key string), <code>product-version</code> (product version string)</li>
+                                    <li><code>attestation_raw</code> (raw file content, as bytes), <code>attestation_predicate</code> (decoded predicate), <code>attestation_predicate_base64</code> (base64-encoded predicate)</li>
                                     <li>Any context field: <code>--contextkey--</code> (empty string if missing)</li>
                                     <li>Labels: <code>--labels.labelname--</code> (gets value for label <code>labelname</code>, empty if not found)</li>
                                 </ul>
                                 <b>Examples:</b>
                                 <ul>
-                                    <li><code>{"Authorization": "Bearer \"--secret--\""}</code> → <code>{"Authorization": "Bearer ghpat-1232455"}</code></li>
-                                    <li><code>{"info": "--attestation_details--"}</code> → <code>{"info": {"id": 5, "context": {...}}}</code></li>
+                                    <li><code>{"Authorization": "Bearer --secret--"}</code> → <code>{"Authorization": "Bearer ghpat-1232455"}</code></li>
+                                    <li><code>{"predicate": --attestation_predicate--}</code> → <code>{"predicate": { ... }}</code></li>
                                 </ul>
                                 If a variable is not found, it is replaced with an empty string.
                             </small>

templates/webhooks.html

@@ -180,20 +180,20 @@
                 <label for="webhookContent" class="form-label">Content Template (JSON)</label>
                 <textarea class="form-control" id="webhookContent" name="content" rows="5" placeholder='{"attestation":{attestation_details}}'></textarea>
                 <small class="form-text text-muted">
-                  <b>Templating:</b> You can use variables in the form <code>"--varname--"</code> (double quote, two dashes, name, two dashes, double quote) anywhere in the URL, headers, or content.<br>
-                  <b>Supported variables:</b>
-                  <ul>
-                      <li><code>secret</code>, <code>product-key</code>, <code>product-version</code>, <code>attestation_details</code></li>
-                      <li><code>raw_attestation</code>, <code>attestation_json</code>, <code>attestation_predicate</code>, <code>attestation_predicate_b64</code> (loads attestation from storage only if used)</li>
-                      <li>Any context field: <code>--contextkey--</code> (empty string if missing)</li>
-                      <li>Labels: <code>--labels.labelname--</code> (gets value for label <code>labelname</code>, empty if not found)</li>
-                  </ul>
-                  <b>Examples:</b>
-                  <ul>
-                      <li><code>{"Authorization": "Bearer \"--secret--\""}</code> → <code>{"Authorization": "Bearer ghpat-1232455"}</code></li>
-                      <li><code>{"info": "--attestation_details--"}</code> → <code>{"info": {"id": 5, "context": {...}}}</code></li>
-                  </ul>
-                  If a variable is not found, it is replaced with an empty string.
+          <b>Templating:</b> Use variables in the form <code>--varname--</code> (two dashes, name, two dashes) anywhere in the URL, headers, or content.<br>
+          <b>Supported variables:</b>
+          <ul>
+            <li><code>product-key</code> (product key string), <code>product-version</code> (product version string)</li>
+            <li><code>attestation_raw</code> (raw file content, as bytes), <code>attestation_predicate</code> (decoded predicate), <code>attestation_predicate_base64</code> (base64-encoded predicate)</li>
+            <li>Any context field: <code>--contextkey--</code> (empty string if missing)</li>
+            <li>Labels: <code>--labels.labelname--</code> (gets value for label <code>labelname</code>, empty if not found)</li>
+          </ul>
+          <b>Examples:</b>
+          <ul>
+            <li><code>{"Authorization": "Bearer --secret--"}</code> → <code>{"Authorization": "Bearer ghpat-1232455"}</code></li>
+            <li><code>{"predicate": --attestation_predicate--}</code> → <code>{"predicate": { ... }}</code></li>
+          </ul>
+          If a variable is not found, it is replaced with an empty string.
                 </small>
               </div>
               <div class="mb-3">