feat(01-01): add ClickHouse dependencies, Docker Compose, schema, and app config

- Add clickhouse-jdbc, springdoc-openapi, actuator, testcontainers deps
- Add slf4j-api to core module
- Create Docker Compose with ClickHouse service on ports 8123/9000
- Create ClickHouse DDL: route_executions, route_diagrams, agent_metrics
- Configure application.yml with datasource, ingestion buffer, springdoc

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

clickhouse/init/01-schema.sql

@@ -0,0 +1,57 @@
+-- Cameleer3 ClickHouse Schema
+-- Tables for route executions, route diagrams, and agent metrics.
+
+CREATE TABLE IF NOT EXISTS 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    Nullable(String),
+    error_stacktrace Nullable(String),
+    -- Nested processor executions stored as parallel arrays
+    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)),
+    -- Metadata
+    server_received_at DateTime64(3, 'UTC') DEFAULT now64(3, 'UTC'),
+    -- Skip indexes
+    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 start_time + INTERVAL 30 DAY
+SETTINGS ttl_only_drop_parts = 1;
+
+CREATE TABLE IF NOT EXISTS 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 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 collected_at + INTERVAL 30 DAY
+SETTINGS ttl_only_drop_parts = 1;