feat(simulation): knowledge grant schema, events, and contradiction detection (#545, #546, #547)

KnowledgeGrant untagged enum (Fact + Entity variants), ContentEntityRegistry
resource, KnowledgeGranted event processing, ContradictionClaim struct with
600-tick window detection in observe_entity. Wires knowledge_grant field in
dialogue line selection. Implements D-079, D-083. Closes Q-026.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/perception/interpretation.rs

@@ -208,6 +208,7 @@ mod tests {
         world.insert_resource(WalkabilityMap::new(32, 32, 1));
         world.init_resource::<SnapshotBuffer>();
         world.init_resource::<crate::knowledge::KnowledgeEventQueue>();
+        world.init_resource::<crate::knowledge::ContradictionDetectedQueue>();
         world.init_resource::<EntityRegistry>();
         world.init_resource::<ObservationEventQueue>();
         world.init_resource::<VisibilityGeometry>();

server/src/perception/observer/tests.rs

@@ -505,6 +505,7 @@ fn knowledge_without_position_not_shown() {
             state: crate::knowledge::KnowledgeState::Active,
             relationship: RelationshipState::PersonOfInterest,
             known_attributes: std::collections::BTreeMap::new(),
+            contradicted_claim: None,
         },
     );
 
@@ -800,6 +801,7 @@ fn phase2_no_confront_without_knows_details() {
             state: KnowledgeState::Active,
             relationship: RelationshipState::Unknown,
             known_attributes: std::collections::BTreeMap::new(),
+            contradicted_claim: None,
         },
     );
 
@@ -2271,6 +2273,7 @@ fn access_rule_knowledge_gated_passes_with_matching_fact() {
             source: KnowledgeSource::Background,
             state: KnowledgeState::Active,
             acquired_tick: 0,
+            disclosure_blocked: false,
         },
     );