Reconcile iCalendar replies from mail

src/govoplan_mail/backend/manifest.py

@@ -299,7 +299,7 @@ manifest = ModuleManifest(
     name="Mail",
     version="0.1.10",
     required_capabilities=(CAPABILITY_AUTH_PRINCIPAL_RESOLVER, CAPABILITY_AUTH_PERMISSION_EVALUATOR),
-    optional_dependencies=("campaigns", "addresses"),
+    optional_dependencies=("campaigns", "addresses", "calendar"),
     provides_interfaces=(
         ModuleInterfaceProvider(name="mail.campaign_delivery", version="0.2.0"),
         ModuleInterfaceProvider(name="mail.delivery_commands", version="0.1.0"),
@@ -308,6 +308,12 @@ manifest = ModuleManifest(
         ModuleInterfaceProvider(name="mail.bounce_processing", version="0.1.0"),
     ),
     requires_interfaces=(
+        ModuleInterfaceRequirement(
+            name="calendar.invitations",
+            version_min="0.2.0",
+            version_max_exclusive="0.3.0",
+            optional=True,
+        ),
         ModuleInterfaceRequirement(
             name="campaigns.access",
             version_min="0.1.0",
@@ -444,7 +450,10 @@ manifest = ModuleManifest(
                 "bounded message/delivery-status reports without changing mailbox flags, "
                 "and records idempotent per-recipient observations. SMTP acceptance remains "
                 "separate from a later bounce. Unmatched reports remain visible for review; "
-                "Mail stores only bounded diagnostics and a raw digest, not the raw bounce body."
+                "Mail stores only bounded diagnostics and a raw digest, not the raw bounce body. "
+                "When Calendar is active, the same bounded source scan forwards METHOD:REPLY "
+                "iCalendar parts to Calendar for idempotent attendee reconciliation without "
+                "classifying the message as a bounce."
             ),
             layer="configured",
             documentation_types=("admin", "user"),
@@ -456,7 +465,7 @@ manifest = ModuleManifest(
                     any_scopes=("mail:bounce:read", "mail:bounce:manage"),
                 ),
             ),
-            related_modules=("campaigns", "audit"),
+            related_modules=("campaigns", "calendar", "audit"),
             metadata={
                 "kind": "workflow",
                 "route": "/mail/bounces",