fix: keep Hermes session across runs and speak long replies as a digest (2.5.3)

Over the runs transport Hermes never reports the session it attached to a
run in the SSE stream, only in GET /v1/runs/{id}. EveFlow only read it in the
polling fallback, so the locally generated id was sent again and again and
each message opened a fresh Hermes session, losing the conversation context.
The client now adopts the run's session id after every run.

Long answers are now spoken as a digest: the first sentences (configurable,
4 by default) plus the closing question, followed by a short notice that the
full text is on screen. The default instructions ask Hermes to open long
replies with the essentials and to rely on the ongoing conversation.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ln4KL1feHtnV4nee4sZFhM

package.json

@@ -1,7 +1,7 @@
 {
   "name": "eveflow",
-  "version": "2.5.2",
-  "releaseVersion": "2.5.2",
+  "version": "2.5.3",
+  "releaseVersion": "2.5.3",
   "description": "JARVIS-style desktop HUD for Hermes Agent: voice, streaming runs, scheduled jobs, skills and telemetry",
   "main": "dist-electron/main.js",
   "private": true,