fix: split Flyway migration — DDL in V1, policies in V2

TimescaleDB add_continuous_aggregate_policy and add_compression_policy
cannot run inside a transaction block. Move all policy calls to V2
with flyway:executeInTransaction=false directive.

Also fix stats_1m_processor_detail: add WITH NO DATA and
materialized_only = false.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

cameleer3-server-app/src/main/resources/db/migration/V1__init.sql

@@ -147,13 +147,6 @@ SELECT create_hypertable('agent_metrics', 'collected_at', chunk_time_interval =>
 
 CREATE INDEX idx_metrics_agent_name ON agent_metrics (agent_id, metric_name, collected_at DESC);
 
--- Retention: drop agent_metrics chunks older than 90 days
-SELECT add_retention_policy('agent_metrics', INTERVAL '90 days', if_not_exists => true);
-
--- Compression: compress agent_metrics chunks older than 7 days
-ALTER TABLE agent_metrics SET (timescaledb.compress);
-SELECT add_compression_policy('agent_metrics', INTERVAL '7 days', if_not_exists => true);
-
 -- =============================================================
 -- Route diagrams
 -- =============================================================
@@ -238,10 +231,6 @@ WHERE status IS NOT NULL
 GROUP BY bucket
 WITH NO DATA;
 
-SELECT add_continuous_aggregate_policy('stats_1m_all',
-    start_offset => INTERVAL '1 hour',
-    end_offset   => INTERVAL '1 minute',
-    schedule_interval => INTERVAL '1 minute');
 
 CREATE MATERIALIZED VIEW stats_1m_app
 WITH (timescaledb.continuous, timescaledb.materialized_only = false) AS
@@ -259,10 +248,6 @@ WHERE status IS NOT NULL
 GROUP BY bucket, application_name
 WITH NO DATA;
 
-SELECT add_continuous_aggregate_policy('stats_1m_app',
-    start_offset => INTERVAL '1 hour',
-    end_offset   => INTERVAL '1 minute',
-    schedule_interval => INTERVAL '1 minute');
 
 CREATE MATERIALIZED VIEW stats_1m_route
 WITH (timescaledb.continuous, timescaledb.materialized_only = false) AS
@@ -281,10 +266,6 @@ WHERE status IS NOT NULL
 GROUP BY bucket, application_name, route_id
 WITH NO DATA;
 
-SELECT add_continuous_aggregate_policy('stats_1m_route',
-    start_offset => INTERVAL '1 hour',
-    end_offset   => INTERVAL '1 minute',
-    schedule_interval => INTERVAL '1 minute');
 
 CREATE MATERIALIZED VIEW stats_1m_processor
 WITH (timescaledb.continuous, timescaledb.materialized_only = false) AS
@@ -302,13 +283,9 @@ FROM processor_executions
 GROUP BY bucket, application_name, route_id, processor_type
 WITH NO DATA;
 
-SELECT add_continuous_aggregate_policy('stats_1m_processor',
-    start_offset => INTERVAL '1 hour',
-    end_offset   => INTERVAL '1 minute',
-    schedule_interval => INTERVAL '1 minute');
 
 CREATE MATERIALIZED VIEW stats_1m_processor_detail
-WITH (timescaledb.continuous) AS
+WITH (timescaledb.continuous, timescaledb.materialized_only = false) AS
 SELECT
     time_bucket('1 minute', start_time) AS bucket,
     application_name,
@@ -321,9 +298,6 @@ SELECT
     MAX(duration_ms) AS duration_max,
     approx_percentile(0.99, percentile_agg(duration_ms)) AS p99_duration
 FROM processor_executions
-GROUP BY bucket, application_name, route_id, processor_id, processor_type;
+GROUP BY bucket, application_name, route_id, processor_id, processor_type
+WITH NO DATA;
 
-SELECT add_continuous_aggregate_policy('stats_1m_processor_detail',
-    start_offset => INTERVAL '1 hour',
-    end_offset   => INTERVAL '1 minute',
-    schedule_interval => INTERVAL '1 minute');

cameleer3-server-app/src/main/resources/db/migration/V2__policies.sql

@@ -0,0 +1,38 @@
+-- V2__policies.sql - TimescaleDB policies (must run outside transaction)
+-- flyway:executeInTransaction=false
+
+-- Agent metrics retention & compression
+ALTER TABLE agent_metrics SET (timescaledb.compress);
+SELECT add_retention_policy('agent_metrics', INTERVAL '90 days', if_not_exists => true);
+SELECT add_compression_policy('agent_metrics', INTERVAL '7 days', if_not_exists => true);
+
+-- Continuous aggregate refresh policies
+SELECT add_continuous_aggregate_policy('stats_1m_all',
+    start_offset => INTERVAL '1 hour',
+    end_offset   => INTERVAL '1 minute',
+    schedule_interval => INTERVAL '1 minute',
+    if_not_exists => true);
+
+SELECT add_continuous_aggregate_policy('stats_1m_app',
+    start_offset => INTERVAL '1 hour',
+    end_offset   => INTERVAL '1 minute',
+    schedule_interval => INTERVAL '1 minute',
+    if_not_exists => true);
+
+SELECT add_continuous_aggregate_policy('stats_1m_route',
+    start_offset => INTERVAL '1 hour',
+    end_offset   => INTERVAL '1 minute',
+    schedule_interval => INTERVAL '1 minute',
+    if_not_exists => true);
+
+SELECT add_continuous_aggregate_policy('stats_1m_processor',
+    start_offset => INTERVAL '1 hour',
+    end_offset   => INTERVAL '1 minute',
+    schedule_interval => INTERVAL '1 minute',
+    if_not_exists => true);
+
+SELECT add_continuous_aggregate_policy('stats_1m_processor_detail',
+    start_offset => INTERVAL '1 hour',
+    end_offset   => INTERVAL '1 minute',
+    schedule_interval => INTERVAL '1 minute',
+    if_not_exists => true);