* Fix interpolation in data_migration.ex
* Speed up calculating acquisition_channel in clickhouse
The previous `has` queries proved to be problematic and causing a lot of
CPU overhead.
Benchmarked via this query:
```sql
SELECT
channel,
count(),
countIf(acquisition_channel(referrer_source, utm_medium, utm_campaign, utm_source, click_id_param) = channel) AS matches
FROM events_v2
WHERE timestamp > now() - toIntervalHour(48)
GROUP BY channel
ORDER BY count() desc
```
Before this fix:
```
query_duration_ms: 57960
DiskReadElapsedMs: 374.712
RealTimeMs: 2891200.667
UserTimeMs: 2704024.783
SystemTimeMs: 1693.265
OSCPUWaitMs: 90.253
OSCPUVirtualTimeMs: 2705709.58
```
After this fix:
```
query_duration_ms: 4367
DiskReadElapsedMs: 454.356
RealTimeMs: 213892.207
UserTimeMs: 199363.485
SystemTimeMs: 1479.364
OSCPUWaitMs: 13.739
OSCPUVirtualTimeMs: 200837.37
```
Note that the new tables are not tracked in our schema as usual as
they're pretty much temporary tables to create the dictionary without
needing to upload files to clickhouse servers.
* CREATE OR REPLACE table with SELECT
* Add data migration for creating and syncing location_data table and dictionary
* Migration to populate location data
* Daily cron to refresh location dataset if changed
* Add support for visit:country_name, visit:region_name and visit:city_name dimensions
Under the hood this relies on a `location_data` table in clickhouse being regularly synced with
plausible/location repo and dictionary lookups used in ALIAS columns
* Update queue name
* Update documentation
* Explicit structs
* Improve docs further
* Migration comment
* Add queues
* Add error when already loaded
* Test for filtering by new dimensions
* Update deps
* dimension -> select_dimension
* Update a test
* Use clickhouse-ecto for stats
* Use clickhouse ecto instead of low-level clickhousex
* Remove defaults from event schema
* Remove all references to Clickhousex
* Document configuration change
* Ensure createdb and migrations can be run in a release
* Remove config added for debug
* Update plausible_variables.sample.env
Karl-Aksel Puulmann
Adam
Uku Taht