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/config.xml

@@ -0,0 +1,15 @@
+<clickhouse>
+  <logger>
+    <level>warning</level>
+    <log>/var/log/clickhouse-server/clickhouse-server.log</log>
+    <errorlog>/var/log/clickhouse-server/clickhouse-server.err.log</errorlog>
+    <size>500M</size>
+    <count>3</count>
+  </logger>
+  <listen_host>0.0.0.0</listen_host>
+  <http_port>8123</http_port>
+  <tcp_port>9000</tcp_port>
+  <max_server_memory_usage_to_ram_ratio>0.4</max_server_memory_usage_to_ram_ratio>
+  <async_insert_threads>4</async_insert_threads>
+  <mark_cache_size>5368709120</mark_cache_size>
+</clickhouse>

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>