Server fully owns ClickHouse schema — create database + tables on startup

ClickHouseConfig.ensureDatabaseExists() connects without the database path
to run CREATE DATABASE IF NOT EXISTS before the main DataSource is used.
Removes the ConfigMap-based init scripts from the K8s manifest — the server
is now the single owner of all ClickHouse schema management.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

deploy/clickhouse.yaml

@@ -1,86 +1,3 @@
-apiVersion: v1
-kind: ConfigMap
-metadata:
-  name: clickhouse-init-schema
-  namespace: cameleer
-data:
-  01-schema.sql: |
-    CREATE DATABASE IF NOT EXISTS cameleer3;
-
-    CREATE TABLE IF NOT EXISTS cameleer3.route_executions (
-        execution_id     String,
-        route_id         LowCardinality(String),
-        agent_id         LowCardinality(String),
-        status           LowCardinality(String),
-        start_time       DateTime64(3, 'UTC'),
-        end_time         Nullable(DateTime64(3, 'UTC')),
-        duration_ms      UInt64,
-        correlation_id   String,
-        exchange_id      String,
-        error_message    String DEFAULT '',
-        error_stacktrace String DEFAULT '',
-        processor_ids       Array(String),
-        processor_types     Array(LowCardinality(String)),
-        processor_starts    Array(DateTime64(3, 'UTC')),
-        processor_ends      Array(DateTime64(3, 'UTC')),
-        processor_durations Array(UInt64),
-        processor_statuses  Array(LowCardinality(String)),
-        server_received_at DateTime64(3, 'UTC') DEFAULT now64(3, 'UTC'),
-        INDEX idx_correlation correlation_id TYPE bloom_filter GRANULARITY 4,
-        INDEX idx_error error_message TYPE tokenbf_v1(32768, 3, 0) GRANULARITY 4
-    )
-    ENGINE = MergeTree()
-    PARTITION BY toYYYYMMDD(start_time)
-    ORDER BY (agent_id, status, start_time, execution_id)
-    TTL toDateTime(start_time) + toIntervalDay(30)
-    SETTINGS ttl_only_drop_parts = 1;
-
-    CREATE TABLE IF NOT EXISTS cameleer3.route_diagrams (
-        content_hash     String,
-        route_id         LowCardinality(String),
-        agent_id         LowCardinality(String),
-        definition       String,
-        created_at       DateTime64(3, 'UTC') DEFAULT now64(3, 'UTC')
-    )
-    ENGINE = ReplacingMergeTree(created_at)
-    ORDER BY (content_hash);
-
-    CREATE TABLE IF NOT EXISTS cameleer3.agent_metrics (
-        agent_id         LowCardinality(String),
-        collected_at     DateTime64(3, 'UTC'),
-        metric_name      LowCardinality(String),
-        metric_value     Float64,
-        tags             Map(String, String),
-        server_received_at DateTime64(3, 'UTC') DEFAULT now64(3, 'UTC')
-    )
-    ENGINE = MergeTree()
-    PARTITION BY toYYYYMMDD(collected_at)
-    ORDER BY (agent_id, metric_name, collected_at)
-    TTL toDateTime(collected_at) + toIntervalDay(30)
-    SETTINGS ttl_only_drop_parts = 1;
-
-  02-search-columns.sql: |
-    ALTER TABLE cameleer3.route_executions
-        ADD COLUMN IF NOT EXISTS exchange_bodies String DEFAULT '',
-        ADD COLUMN IF NOT EXISTS exchange_headers String DEFAULT '',
-        ADD COLUMN IF NOT EXISTS processor_depths Array(UInt16) DEFAULT [],
-        ADD COLUMN IF NOT EXISTS processor_parent_indexes Array(Int32) DEFAULT [],
-        ADD COLUMN IF NOT EXISTS processor_error_messages Array(String) DEFAULT [],
-        ADD COLUMN IF NOT EXISTS processor_error_stacktraces Array(String) DEFAULT [],
-        ADD COLUMN IF NOT EXISTS processor_input_bodies Array(String) DEFAULT [],
-        ADD COLUMN IF NOT EXISTS processor_output_bodies Array(String) DEFAULT [],
-        ADD COLUMN IF NOT EXISTS processor_input_headers Array(String) DEFAULT [],
-        ADD COLUMN IF NOT EXISTS processor_output_headers Array(String) DEFAULT [],
-        ADD COLUMN IF NOT EXISTS processor_diagram_node_ids Array(String) DEFAULT [],
-        ADD COLUMN IF NOT EXISTS diagram_content_hash String DEFAULT '';
-
-    ALTER TABLE cameleer3.route_executions
-        ADD INDEX IF NOT EXISTS idx_exchange_bodies exchange_bodies TYPE tokenbf_v1(32768, 3, 0) GRANULARITY 4,
-        ADD INDEX IF NOT EXISTS idx_exchange_headers exchange_headers TYPE tokenbf_v1(32768, 3, 0) GRANULARITY 4;
-
-    ALTER TABLE cameleer3.route_executions
-        ADD INDEX IF NOT EXISTS idx_error_stacktrace error_stacktrace TYPE tokenbf_v1(32768, 3, 0) GRANULARITY 4;
----
 apiVersion: apps/v1
 kind: StatefulSet
 metadata:
@@ -115,9 +32,6 @@ spec:
           volumeMounts:
             - name: data
               mountPath: /var/lib/clickhouse
-            - name: init-schema
-              mountPath: /docker-entrypoint-initdb.d
-              readOnly: true
           resources:
             requests:
               memory: "512Mi"
@@ -125,10 +39,6 @@ spec:
             limits:
               memory: "1Gi"
               cpu: "1000m"
-      volumes:
-        - name: init-schema
-          configMap:
-            name: clickhouse-init-schema
   volumeClaimTemplates:
     - metadata:
         name: data