brokerd: memory calls to memoryd with the session's state; labels only stricter

Implemented-By: OpenCode session (model recorded in docs/implementer-log.md)

crates/brokerd/src/policy/mod.rs

@@ -151,6 +151,8 @@ pub struct Decision {
     request: ToolRequest,
     args: ToolArgs,
     matched: Matched,
+    /// The session's state when the call was decided; `memoryd` needs it (M5a spec, section 8).
+    state: SessionState,
 }
 
 /// A call the broker left for the owner: built only in this module, re-decided by `redecide`.
@@ -165,6 +167,9 @@ impl Decision {
     pub fn request(&self) -> &ToolRequest {
         &self.request
     }
+    pub fn state(&self) -> SessionState {
+        self.state
+    }
     pub fn args(&self) -> &ToolArgs {
         &self.args
     }
@@ -278,6 +283,7 @@ pub fn decide(
             request,
             args,
             matched,
+            state,
         }),
     }
 }
@@ -315,6 +321,7 @@ pub fn redecide(
             request: ask.request().clone(),
             args: ask.args().clone(),
             matched,
+            state,
         }),
     }
 }