feat(agentswarm): M1+M3 — embeddable swarm runtime wrapping deepagents

@logicsrc/agentswarm: a self-hosted, framework-agnostic multi-agent runtime
that each app mounts on its own route (e.g. tronbrowser.dev/swarm).

M1 — core:
- createSwarmHandler(): Web (Request)=>Response handler, CORS + validation
- SwarmRunner: injectable engine interface
- createDeepAgentRunner(): deepagents (createDeepAgent) adapter; deepagents +
  @langchain/langgraph are optional peers loaded via dynamic import so the core
  builds/tests with zero heavy deps
- SwarmError + onRequest gate: seam for x402 metering / auth (402/403)

M3 — rubric self-check (deepagents RubricMiddleware is Python-only, so ported
at the runner layer):
- createRubricRunner(): grades output via an injectable judge and revises until
  it passes or maxIterations; passes through untouched when no rubric
- createLLMJudge(): cheap-model grader (lazy langchain initChatModel)

13/13 vitest pass; tsc clean; examples/server.mjs demo verified.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

package-lock.json

@@ -1388,6 +1388,10 @@
       "resolved": "packages/agentstack",
       "link": true
     },
+    "node_modules/@logicsrc/agentswarm": {
+      "resolved": "packages/agentswarm",
+      "link": true
+    },
     "node_modules/@logicsrc/ans": {
       "resolved": "packages/ans",
       "link": true
@@ -6038,6 +6042,26 @@
         "vitest": "^4.0.8"
       }
     },
+    "packages/agentswarm": {
+      "name": "@logicsrc/agentswarm",
+      "version": "0.1.0",
+      "license": "MIT",
+      "devDependencies": {
+        "vitest": "^4.0.8"
+      },
+      "peerDependencies": {
+        "@langchain/langgraph": "*",
+        "deepagents": "^1.10.0"
+      },
+      "peerDependenciesMeta": {
+        "@langchain/langgraph": {
+          "optional": true
+        },
+        "deepagents": {
+          "optional": true
+        }
+      }
+    },
     "packages/ans": {
       "name": "@logicsrc/ans",
       "version": "0.1.0",