feat: add V7 migration for per-processor-id continuous aggregate

cameleer3-server-app/src/main/resources/db/migration/V7__processor_stats_by_id.sql

@@ -0,0 +1,21 @@
+-- V7: Per-processor-id continuous aggregate for route detail page
+CREATE MATERIALIZED VIEW stats_1m_processor_detail
+WITH (timescaledb.continuous) AS
+SELECT
+  time_bucket('1 minute', start_time) AS bucket,
+  group_name,
+  route_id,
+  processor_id,
+  processor_type,
+  COUNT(*) AS total_count,
+  COUNT(*) FILTER (WHERE status = 'FAILED') AS failed_count,
+  SUM(duration_ms) AS duration_sum,
+  MAX(duration_ms) AS duration_max,
+  approx_percentile(0.99, percentile_agg(duration_ms)) AS p99_duration
+FROM processor_executions
+GROUP BY bucket, group_name, route_id, processor_id, processor_type;
+
+SELECT add_continuous_aggregate_policy('stats_1m_processor_detail',
+  start_offset => INTERVAL '1 hour',
+  end_offset   => INTERVAL '1 minute',
+  schedule_interval => INTERVAL '1 minute');