Fix HTML entity decoding and broaden OSINT dedup window

- Replace single ' handler with generic numeric/hex entity decoder
  so ' and other unpadded entities are properly converted
- Dedup urgent OSINT posts against all hot memory runs (last 3 sweeps)
  instead of only the previous sweep, preventing posts that drop out
  of one sweep from reappearing as "new" in the next

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lib/delta/memory.mjs

@@ -74,7 +74,9 @@ export class MemoryManager {
   // Add a new run to hot memory
   addRun(synthesizedData) {
     const previous = this.getLastRun();
-    const delta = computeDelta(synthesizedData, previous);
+    // Collect urgent post hashes from all hot runs for broader dedup window
+    const priorRuns = this.hot.runs.map(r => r.data);
+    const delta = computeDelta(synthesizedData, previous, {}, priorRuns);
 
     // Compact the data for storage (strip large arrays)
     const compact = this._compactForStorage(synthesizedData);