initial: import DOLPHIN baseline 2026-04-21 from dolphinng5_predict working tree

Includes core prod + GREEN/BLUE subsystems:
- prod/ (BLUE harness, configs, scripts, docs)
- nautilus_dolphin/ (GREEN Nautilus-native impl + dvae/ preserved)
- adaptive_exit/ (AEM engine + models/bucket_assignments.pkl)
- Observability/ (EsoF advisor, TUI, dashboards)
- external_factors/ (EsoF producer)
- mc_forewarning_qlabs_fork/ (MC regime/envelope)

Excludes runtime caches, logs, backups, and reproducible artifacts per .gitignore.

prod/clickhouse/users.xml

@@ -0,0 +1,17 @@
+<clickhouse>
+  <users>
+    <dolphin>
+      <password>dolphin_ch_2026</password>
+      <networks>
+        <ip>::/0</ip>
+      </networks>
+      <profile>default</profile>
+      <quota>default</quota>
+      <settings>
+        <async_insert>1</async_insert>
+        <wait_for_async_insert>0</wait_for_async_insert>
+        <max_insert_threads>4</max_insert_threads>
+      </settings>
+    </dolphin>
+  </users>
+</clickhouse>