chore(docker): disable ClickHouse system log tables in local dev (#3565)

## Summary

Local ClickHouse was burning ~325% CPU endlessly merging its own
telemetry tables (`metric_log`, `asynchronous_metric_log`, `part_log`,
`trace_log`) after the container had been running long enough to
accumulate hundreds of GB of system-log data. OrbStack Helper reflected
this on the host (~400% CPU).

These tables are not used by anything in the dev stack. They only exist
for ClickHouse to log itself, so disabling them eliminates the merge
churn entirely.

## Changes

- Adds `docker/config/clickhouse-disable-system-logs.xml`, mounted into
`/etc/clickhouse-server/config.d/`, that removes the noisy system log
tables via `<table remove="1"/>`.
- Mounts the override file in `docker/docker-compose.yml`.

After applying, idle CPU dropped from 325% to ~12% on my machine.

## Test plan

- [ ] `pnpm run docker` brings up the stack cleanly
- [ ] `docker stats clickhouse` shows low idle CPU
- [ ] App functionality unaffected (system log tables are not queried by
the webapp)

docker/config/clickhouse-disable-system-logs.xml

@@ -0,0 +1,13 @@
+<clickhouse>
+    <metric_log remove="1"/>
+    <asynchronous_metric_log remove="1"/>
+    <part_log remove="1"/>
+    <trace_log remove="1"/>
+    <query_thread_log remove="1"/>
+    <session_log remove="1"/>
+    <text_log remove="1"/>
+    <zookeeper_log remove="1"/>
+    <processors_profile_log remove="1"/>
+    <asynchronous_insert_log remove="1"/>
+    <backup_log remove="1"/>
+</clickhouse>

docker/docker-compose.yml

@@ -137,6 +137,7 @@ services:
     volumes:
       - clickhouse-data:/var/lib/clickhouse
       - clickhouse-logs:/var/log/clickhouse-server
+      - ./config/clickhouse-disable-system-logs.xml:/etc/clickhouse-server/config.d/disable-system-logs.xml:ro
     networks:
       - app_network
     healthcheck: