fix(token-meter): bound projection state via logged shadow prices

The contextBreakdown and contextPressure units carried the full priced
surface, so each session's persisted projection checkpoint grew without
bound. A surface replacement is now priced by the shadow-price event
logged directly before it — compact/summary for compaction, the new
compact/prune from tool-result pruning (priced through the injected
token meter) — and the unit states shrink to a fixed handful of numbers.
Regenerate the persistence/cordis/module/config catalogs.

packages/compact/compact/src/types.ts

@@ -20,8 +20,11 @@ declare module '@deepseek-ai/dsh-session' {
     /**
      * Provenance record of a completed summarization — log-only, no surfaceOp.
      * The summary content is in `data.summary`; the actual surface replacement
-     * is performed by a subsequent `user/message` event that shadows the
-     * compacted range.
+     * is performed by the immediately following `user/message` event that
+     * shadows the compacted range. That adjacency is contractual — the
+     * shadowed pricing fields are the replacement's shadow price, so a
+     * consumer may pair a replacement with the metering event directly
+     * before it (`compact/prune` documents the shared protocol).
      */
     'compact/summary': {
       summary: ContentBlock[]
@@ -49,6 +52,23 @@ declare module '@deepseek-ai/dsh-session' {
      * matches `compact/start`; `error` records an unsuccessful attempt.
      */
     'compact/end': { turn: number | null; error?: string }
+    /**
+     * Shadow price of one model-free prune replacement — log-only, no
+     * surfaceOp. The shared shadow-price protocol: a surface `replace` event
+     * is priced by the metering event immediately before it (`compact/summary`
+     * for a summarizing compaction, this event for a prune), which states the
+     * heuristic token price of the exact replaced range so a pure consumer
+     * can subtract it without retaining per-node prices. The replacement MUST
+     * be appended synchronously right after this event.
+     */
+    'compact/prune': {
+      /** The replaced range's first and last surface-node seqs (a surface-position span, like {@link CompactionResult.shadowedRange}). */
+      shadowedRange: { start: number; end: number }
+      /** The seqs of all shadowed surface nodes, in surface order. */
+      shadowedSeqs: number[]
+      /** Heuristic price of the shadowed content under the token-meter's fixed estimator. */
+      shadowedTokenCount: number
+    }
   }
 }