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/knowledge/mod.rs

@@ -7,12 +7,18 @@
 use bevy_app::prelude::*;
 use bevy_ecs::prelude::*;
 
+pub mod content_registry;
 pub mod events;
 pub mod graph;
 pub mod registry;
 pub mod types;
 
-pub use events::{InteractionType, KnowledgeEvent, KnowledgeEventQueue, KnowledgeEventType};
+pub use content_registry::ContentEntityRegistry;
+pub use events::{
+    ContradictionDetectedEvent, ContradictionDetectedQueue, InteractionType, KnowledgeEvent,
+    KnowledgeEventQueue, KnowledgeEventType, ProcessedEntityGrant, ProcessedFactGrant,
+    ProcessedKnowledgeGrant,
+};
 pub use graph::KnowledgeGraph;
 pub use registry::{EntityRegistry, StableEntityId};
 pub use types::*;
@@ -24,7 +30,9 @@ pub struct KnowledgePlugin;
 impl Plugin for KnowledgePlugin {
     fn build(&self, app: &mut App) {
         app.init_resource::<KnowledgeEventQueue>()
+            .init_resource::<ContradictionDetectedQueue>()
             .init_resource::<EntityRegistry>()
+            .init_resource::<ContentEntityRegistry>()
             .init_resource::<DecayThresholds>()
             .add_systems(
                 Update,