feat(chats): parse LinkedIn MCP v4.22 inbox/conversation blobs. (#6)

get_inbox/get_conversation return a sections+references envelope, not a
message list. Parser is covered by synthetic Alice/Bob fixtures; CI now
runs the nested bin/chats tests. Session check no longer launches Chromium.

.github/workflows/ci.yml

@@ -46,6 +46,10 @@ jobs:
         working-directory: bin/kbsearch
         run: go test ./rank -count=1
 
+      - name: Go tests (chats nested module)
+        working-directory: bin/chats
+        run: go test ./... -count=1
+
       - name: facts/audit self (lexicon consistency, no network)
         run: |
           ./bin/facts/audit self 2>/dev/null || echo "audit: not yet implemented; gate skipped"