plugin AP Gateway: various fixes and improvements:

- Sign item requests with the service/node actor and use the publisher for `attributedTo`.
- http_server: add missing `requestor_actor_id` to all `ap_*_request` handlers.
- http_server: fix following acceptation in `handle_follow_activity`.
- http_server: unescape `%40` in `get_ap_actor_data` at the beginning and use
  it everywhere.
- pubsub_service: delete subscription from storage on unsubscribe.
- Fix missing arguments in some calls.
- Fix various issues coming from conversion of data models to Pydantic.
- plugin XEP-0277: add `MbData.is_edit` property.

tests/unit/test_ap-gateway.py

@@ -42,6 +42,7 @@ from libervia.backend.plugins import plugin_comp_ap_gateway
 from libervia.backend.plugins.plugin_comp_ap_gateway import constants as ap_const
 from libervia.backend.plugins.plugin_comp_ap_gateway import TYPE_ACTOR
 from libervia.backend.plugins.plugin_comp_ap_gateway.http_server import HTTPServer
+from libervia.backend.plugins.plugin_misc_identity import IdentityData
 from libervia.backend.plugins.plugin_xep_0277 import NS_ATOM, MbData
 from libervia.backend.plugins.plugin_xep_0424 import NS_MESSAGE_RETRACT
 from libervia.backend.plugins.plugin_xep_0465 import NS_PPS
@@ -671,6 +672,7 @@ class TestActivityPubGateway:
 
         ap_url = parse.urljoin(f"https://{ap_gateway.public_url}", path)
         kwargs = {
+            "requestor_actor_id": test_jid.full(),
             "request": request,
             "data": data,
             "account_jid": test_jid,
@@ -701,8 +703,11 @@ class TestActivityPubGateway:
         assert outbox["first"]
         assert outbox["last"]
 
+        page_params = self.ap_request_params(ap_gateway, url=outbox["first"])
+        # the page request doesn't take the requestor actor ID
+        page_params.pop("requestor_actor_id")
         first_page = await ap_gateway.server.resource.ap_outbox_page_request(
-            **self.ap_request_params(ap_gateway, url=outbox["first"])
+            **page_params
         )
         assert first_page["@context"] == ["https://www.w3.org/ns/activitystreams"]
         assert (
@@ -1134,10 +1139,10 @@ class TestActivityPubGateway:
         # XXX: XMPP identity is normally an amalgam of metadata from several
         #   XEPs/locations (vCard4, vcard-tmp, etc)
         with patch.object(ap_gateway._i, "get_identity") as get_identity:
-            get_identity.return_value = {
-                "nicknames": ["nick1", "nick2"],
-                "description": "test description",
-            }
+            get_identity.return_value = IdentityData(
+                nicknames=["nick1", "nick2"],
+                description="test description",
+            )
             actor_data = await ap_gateway.server.resource.ap_actor_request(
                 **self.ap_request_params(ap_gateway, ap_const.TYPE_ACTOR)
             )
@@ -1388,6 +1393,8 @@ class TestActivityPubGateway:
                 TEST_JID,
                 ap_gateway._m.namespace,
                 [item_elt],
+                TEST_JID,
+                subscribe_extra_nodes=False,
             )
 
         assert ap_post.called
@@ -1444,17 +1451,19 @@ class TestActivityPubGateway:
         assert cache_pubsub_items.called
         # the microblog data put in cache correspond to the item sent to subscribers
         __, __, __, [mb_data] = cache_pubsub_items.call_args.args
-        extra = mb_data.extra
-        repeated = extra.repeated
+        repeated = mb_data["extra"]["repeated"]
         assert repeated is not None
-        assert repeated.by == ap_gateway.get_local_jid_from_account(TEST_AP_ACCOUNT)
+        assert (
+            repeated["by"]
+            == ap_gateway.get_local_jid_from_account(TEST_AP_ACCOUNT).full()
+        )
         xmpp_item_xmpp_url = xmpp_uri.build_xmpp_uri(
             "pubsub",
             path=TEST_JID.full(),
             node=ap_gateway._m.namespace,
             item=xmpp_item["id"],
         )
-        assert repeated.uri == xmpp_item_xmpp_url
+        assert repeated["uri"] == xmpp_item_xmpp_url
 
     @ed
     async def test_xmpp_attachment_noticed_to_ap_like(self, ap_gateway, monkeypatch):