feat: paired review system overhaul — unified service, configurable agents, silent output removal

- Remove UNIFIED_MODE legacy: single service manages all 3 Discord bots
- Add OWNER_AGENT_TYPE / REVIEWER_AGENT_TYPE env vars for configurable agent selection
- Fix Discord channel routing: reviewer output goes through correct bot (discord/discord-review)
- Fix channel name assignment: explicit names prevent agentTypeFilter collision
- Remove silent output suppression system: harness-level protections replace prompt workarounds
- Add reviewer approval detection: DONE marker on first line stops ping-pong
- Include user's original message in reviewer prompt for context
- Fix round_trip_count auto-reset on new user message
- Fix session ID conflict: reviewer doesn't reuse owner's session
- Fix pending progress text flush in runner on close sentinel
- Promote buffered intermediate text to final result when result event has no text
- Remove legacy files: .env.codex.example, .env.codex-review.example, migrate-unify.cjs
- Update CLAUDE.md: server-side build deployment, unified architecture docs

src/agent-output.ts

@@ -1,4 +1,3 @@
-import { parseStructuredOutputEnvelope } from './output-suppression.js';
 import type { StructuredAgentOutput } from './types.js';
 
 export function stringifyLegacyAgentResult(
@@ -21,10 +20,7 @@ export function getStructuredAgentOutput(output: {
   if (output.output) {
     return output.output;
   }
-  if (typeof output.result !== 'string') {
-    return null;
-  }
-  return parseStructuredOutputEnvelope(output.result.trim());
+  return null;
 }
 
 export function getAgentOutputText(output: {
@@ -32,9 +28,6 @@ export function getAgentOutputText(output: {
   result?: string | object | null;
 }): string | null {
   const structured = getStructuredAgentOutput(output);
-  if (structured?.visibility === 'silent') {
-    return null;
-  }
   if (structured?.visibility === 'public') {
     return structured.text;
   }
@@ -51,9 +44,9 @@ export function hasAgentOutputPayload(output: {
   return output.result !== null && output.result !== undefined;
 }
 
-export function isSilentAgentOutput(output: {
+export function isSilentAgentOutput(_output: {
   output?: StructuredAgentOutput;
   result?: string | object | null;
 }): boolean {
-  return getStructuredAgentOutput(output)?.visibility === 'silent';
+  return false;
 }