feat: split ClickHouse into dual configurable databases (ja4_logs / ja4_processing)

Architecture:
- ja4_logs: raw log ingestion (http_logs_raw, http_logs, mv_http_logs)
- ja4_processing: analytics, aggregation, ML, dictionaries, audit

Configuration (env vars):
- CLICKHOUSE_DB_LOGS (default: ja4_logs)
- CLICKHOUSE_DB_PROCESSING (default: ja4_processing)

Changes:
- SQL migrations (10 files): all mabase_prod refs → ja4_logs or ja4_processing
  with correct cross-database references (MVs, views, dicts)
- deploy_schema.sh: substitutes DB names from env vars at deploy time
- Python shared settings: added CLICKHOUSE_DB_LOGS + CLICKHOUSE_DB_PROCESSING
- Dashboard routes (19 files): replaced ~80 hardcoded mabase_prod refs
  with settings.CLICKHOUSE_DB_LOGS / settings.CLICKHOUSE_DB_PROCESSING
- Bot-detector: DB → CLICKHOUSE_DB_PROCESSING, fetch_rules.py configurable
- Correlator: DSN example updated to ja4_logs
- Docker-compose + .env files: new env vars with defaults
- All documentation updated (14 markdown files)

All tests pass: sentinel 10/10, correlator 67.1%, bot-detector 11, dashboard 20, ja4_common 18

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

services/dashboard/docker-compose.yaml

@@ -16,7 +16,9 @@ services:
     environment:
       # ClickHouse
       CLICKHOUSE_HOST: ${CLICKHOUSE_HOST:-clickhouse}
-      CLICKHOUSE_DB: ${CLICKHOUSE_DB:-mabase_prod}
+      CLICKHOUSE_DB: ${CLICKHOUSE_DB:-ja4_processing}
+      CLICKHOUSE_DB_LOGS: ${CLICKHOUSE_DB_LOGS:-ja4_logs}
+      CLICKHOUSE_DB_PROCESSING: ${CLICKHOUSE_DB_PROCESSING:-ja4_processing}
       CLICKHOUSE_USER: ${CLICKHOUSE_USER:-admin}
       CLICKHOUSE_PASSWORD: ${CLICKHOUSE_PASSWORD:-}