clickhouse: commit exit-leg/reconstruction/maras DDLs + UV/violet DDLs (M1 vendor reconcile, upstream-first)

prod/clickhouse/users.xml

@@ -0,0 +1,21 @@
+<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>
+        <!-- Accept ISO-8601 with timezone offsets (e.g. "+00:00") — some PINK
+             writers emit timezone-aware isoformat; strict parsing 400s them
+             and head-of-line-blocks the ch_writer spool (2026-06-11). -->
+        <date_time_input_format>best_effort</date_time_input_format>
+      </settings>
+    </dolphin>
+  </users>
+</clickhouse>