feat: honor temporal read context

docs/PARTIES_DOMAIN.md

@@ -9,6 +9,11 @@ external subject. It belongs to an exact case, workflow, or decision context.
 Contact delivery uses frozen snapshot references so later address changes do
 not rewrite evidence. Preferred channels must be permitted by the procedure.
 
+Unversioned reads follow the platform temporal-data context. An explicit
+procedure-resolution instant takes precedence over the titlebar valid-time
+choice. Recorded-time reconstruction remains separate from real-world
+validity, while permissions and new delivery actions use current state.
+
 ## Representation
 
 Representation powers identify representative and represented Parties, an

src/govoplan_parties/backend/manifest.py

@@ -66,7 +66,7 @@ manifest = ModuleManifest(
             id="parties.procedure-and-representation",
             title="Procedure parties and representation",
             summary="Keep procedure roles and authority distinct from subject master data.",
-            body="Parties stores immutable procedure participation and explicit representation powers. Powers cannot disappear silently and delivery uses frozen contact snapshots.",
+            body="Parties stores immutable procedure participation and explicit representation powers. Powers cannot disappear silently and delivery uses frozen contact snapshots. Unversioned reads follow the titlebar valid-time and recorded-time selection; explicit procedure resolution times take precedence and current authorization is unchanged.",
             layer="configured",
             documentation_types=("admin", "user"),
             audience=("user", "operator", "module_admin", "auditor"),

src/govoplan_parties/backend/service.py

@@ -3,7 +3,6 @@ from __future__ import annotations
 from datetime import UTC, datetime
 from typing import Any, Mapping, Sequence
 
-from sqlalchemy import or_
 from sqlalchemy.orm import Session
 
 from govoplan_core.core.institutional import (
@@ -15,6 +14,8 @@ from govoplan_core.core.institutional import (
     revise_procedure_party,
     revoke_party_representation,
 )
+from govoplan_core.core.temporal import TemporalDataContext
+from govoplan_core.db.temporal import apply_temporal_revision_filter
 from govoplan_parties.backend.db.models import ProcedurePartyRevision
 
 
@@ -123,7 +124,7 @@ def get_procedure_party(
         ProcedurePartyRevision.party_id == party_id,
     )
     if revision is None:
-        query = query.filter(ProcedurePartyRevision.superseded_at.is_(None))
+        query = apply_temporal_revision_filter(query, ProcedurePartyRevision)
     else:
         query = query.filter(ProcedurePartyRevision.revision == revision)
     row = query.order_by(ProcedurePartyRevision.recorded_at.desc()).first()
@@ -151,12 +152,16 @@ class SqlPartyResolver:
             ProcedurePartyRevision.procedure_owner_module == procedure_ref.owner_module,
             ProcedurePartyRevision.procedure_id == procedure_ref.object_id,
         )
-        if effective_at is None:
+        context = None
-            query = query.filter(ProcedurePartyRevision.superseded_at.is_(None))
+        if effective_at is not None:
-        else:
+            context = TemporalDataContext(
-            query = query.filter(
+                validity_mode="at",
-                or_(ProcedurePartyRevision.valid_from.is_(None), ProcedurePartyRevision.valid_from <= effective_at),
+                valid_at=effective_at,
-                or_(ProcedurePartyRevision.valid_to.is_(None), ProcedurePartyRevision.valid_to > effective_at),
+            )
+        query = apply_temporal_revision_filter(
+            query,
+            ProcedurePartyRevision,
+            context=context,
         )
         rows = query.order_by(
             ProcedurePartyRevision.party_id.asc(),

tests/test_parties.py

@@ -15,8 +15,18 @@ from govoplan_core.core.institutional import (
     ProcedureParty,
     TemporalRevision,
 )
+from govoplan_core.core.temporal import (
+    TemporalDataContext,
+    bind_temporal_data_context,
+    reset_temporal_data_context,
+)
 from govoplan_parties.backend.db.models import ProcedurePartyRevision
-from govoplan_parties.backend.service import PartyStoreError, SqlPartyResolver, record_procedure_party
+from govoplan_parties.backend.service import (
+    PartyStoreError,
+    SqlPartyResolver,
+    get_procedure_party,
+    record_procedure_party,
+)
 
 
 NOW = datetime(2026, 8, 1, 11, 0, tzinfo=UTC)
@@ -87,6 +97,32 @@ class PartyTests(unittest.TestCase):
         with self.assertRaisesRegex(Exception, "same-tenant"):
             SqlPartyResolver().list_procedure_parties(self.session, Principal("tenant-2"), procedure_ref=ref("case", "case-1", "cases"))
 
+    def test_read_context_can_reconstruct_recorded_state(self) -> None:
+        record_procedure_party(self.session, self.principal, party=party())
+        revoked = representation(revision="2", revoked_at=NOW + timedelta(hours=1))
+        record_procedure_party(
+            self.session,
+            self.principal,
+            party=party(revision="2", representations=(revoked,)),
+            expected_revision="1",
+        )
+        token = bind_temporal_data_context(
+            TemporalDataContext(
+                validity_mode="at",
+                valid_at=NOW + timedelta(hours=1),
+                recorded_at=NOW + timedelta(seconds=30),
+            )
+        )
+        try:
+            result = get_procedure_party(
+                self.session,
+                self.principal,
+                party_id="representative",
+            )
+            self.assertEqual("1", result.temporal.revision if result else None)
+        finally:
+            reset_temporal_data_context(token)
+
 
 if __name__ == "__main__":
     unittest.main()