fix(telegram): stabilize reply dispatch runtime

Summary:
- Add a stable provider-dispatcher dist entry and legacy alias coverage for stale reply-dispatch chunks.
- Make Telegram reasoning stream previews transient after final delivery and harden visible-send reasoning sanitization.
- Document transient /reasoning stream behavior and credit @BunsDev in the changelog.

Verification:
- pnpm test src/agents/tools/message-tool.test.ts src/infra/tsdown-config.test.ts test/scripts/runtime-postbuild.test.ts extensions/telegram/src/bot-message-dispatch.test.ts src/plugin-sdk/channel-streaming.test.ts src/plugin-sdk/channel-entry-contract.test.ts
- OPENCLAW_VITEST_MAX_WORKERS=1 pnpm test src/channels/plugins/module-loader.test.ts src/plugin-sdk/channel-entry-contract.test.ts
- pnpm exec oxfmt --check --threads=1 <changed files>
- git diff --check
- pnpm build
- GitHub PR checks for b8b7a91834

scripts/runtime-postbuild.mjs

@@ -40,6 +40,10 @@ const LEGACY_ROOT_RUNTIME_COMPAT_ALIASES = [
   // gateway may resolve these only after an npm package tree replacement.
   ["server-close-DsVPJDIx.js", "server-close.runtime.js"],
   ["server-close-DvAvfgr8.js", "server-close.runtime.js"],
+  // v2026.5.3 beta reply-dispatch lazy chunks.
+  ["provider-dispatcher-6EQEtc-t.js", "provider-dispatcher.js"],
+  ["provider-dispatcher-BpL2E92x.js", "provider-dispatcher.js"],
+  ["provider-dispatcher-JG96SkLX.js", "provider-dispatcher.js"],
 ];
 const LEGACY_CLI_EXIT_COMPAT_CHUNKS = [
   {