feat: full-stack Docker Compose integration tests

- 4-container stack: ClickHouse, platform (Rocky 9), bot-detector, dashboard
- Platform builds sentinel on Rocky (CGO+libpcap native), correlator static
- mod-reqin-log compiled with apxs on Rocky (matching RPM build target)
- ClickHouse init script patches credentials for test env (sed-based)
- 8-phase test runner: schema, traffic gen, pipeline, dashboard API, bot-detector, sentinel
- All 13 checks pass, 3 non-blocking warnings (empty dicts, log paths)

SQL schema fixes discovered during integration:
- 02_dictionaries: IPv6CIDR → String (not a valid ClickHouse type)
- 03_anubis_tables: dict_anubis_ua missing has_ip/rule_id/category attrs
- 03_anubis_tables: dict_anubis_country FLAT() → COMPLEX_KEY_HASHED() (String key)
- 09_audit_table: CODEC before DEFAULT → DEFAULT before CODEC

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

tests/integration/platform/sentinel.yml

@@ -0,0 +1,18 @@
+# Sentinel config for integration tests
+core:
+  interface: eth0
+  listen_ports:
+    - 443
+  flow_timeout_sec: 30
+  packet_buffer_size: 1000
+  log_level: debug
+
+outputs:
+  - type: unix_socket
+    enabled: true
+    async_buffer: 5000
+    params:
+      socket_path: /var/run/logcorrelator/network.socket
+
+  - type: stdout
+    enabled: true