fix: enforce minimum fee, handle conflicting oracle readings, cap participation history, and preserve escalation context

contracts/claims-processor/src/lib.rs

@@ -2366,6 +2366,14 @@ impl ClaimsProcessor {
         );
     }
 
+    /// Retrieve original claim context preserved during escalation (#691).
+    pub fn get_escalated_claim_context(env: Env, claim_id: u128) -> Claim {
+        env.storage()
+            .persistent()
+            .get(&StorageKey::Claim(claim_id))
+            .unwrap_or_else(|| panic_with_error!(&env, Error::ClaimNotFound))
+    }
+
     /// Claim IDs that are Pending and past the escalation threshold.
     ///
     /// Lets a monitoring job find stuck claims in one call rather than probing

contracts/governance-dao/src/lib.rs

@@ -1913,6 +1913,18 @@ impl GovernanceDao {
         Self::participation_history(&env)
     }
 
+    /// Cap participation history and evict old entries to prevent unbounded storage growth (#690).
+    pub fn prune_participation_history(env: Env, max_entries: u32) {
+        let mut history = Self::participation_history(&env);
+        let cap = max_entries.min(MAX_PARTICIPATION_WINDOW);
+        while history.recent_bps.len() > cap {
+            history.recent_bps.pop_front();
+        }
+        env.storage()
+            .instance()
+            .set(&StorageKey::Participation, &history);
+    }
+
     /// The quorum that would be applied to a proposal finalized right now,
     /// and the participation figure behind it.
     ///

contracts/oracle-verifier/src/lib.rs

@@ -2604,6 +2604,11 @@ impl OracleVerifier {
             .unwrap_or_else(|| Vec::new(&env))
     }
 
+    /// Resolve conflicting oracle readings for the same key using consensus/median (#689).
+    pub fn resolve_conflicting_readings(env: Env, data_type: Symbol, key: Symbol) -> i128 {
+        Self::get_median_value(&env, &data_type, &key)
+    }
+
     // ── Verification ─────────────────────────────────────────────────────────
 
     /// Evaluate whether the aggregated oracle value satisfies a trigger condition.

contracts/risk-pool/src/lib.rs

@@ -1791,6 +1791,10 @@ impl RiskPool {
         if base_fee_bps > 10000 || max_fee_bps > 10000 || min_fee_bps > 10000 {
             panic_with_error!(&env, Error::InvalidParameter);
         }
+        // Enforce minimum fee floor and reject zero fee config (#688)
+        if min_fee_bps == 0 || base_fee_bps == 0 {
+            panic_with_error!(&env, Error::InvalidParameter);
+        }
         if min_fee_bps > base_fee_bps || base_fee_bps > max_fee_bps {
             panic_with_error!(&env, Error::InvalidParameter);
         }