# What this PR does
This PR set up tracing to propagates trace_id to log lines.
There are two different tracers: local one in manage.py - it's used when
app is started via manage.py runserver. In this case spans will be just
written in console. Second traces is confugured in wsgi.py. It will be
used when app is runned via uwsgi and it will export traces via grpc.
Feature is hidden behind the feature flag.
# What this PR does
Runs Telegram long polling to get updates.
It's enabled by setting `FEATURE_TELEGRAM_LONG_POLLING_ENABLED=True`.
That will disable webhook and run separate deployment for telegram long
polling.
Telegram long polling is not very HA mode, but it does not need to
expose webhook url to internet and simplifies telegram integration.
## Which issue(s) this PR fixes
closes#561
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
# What this PR does
Fixes https://github.com/grafana/oncall/issues/1960.
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
# What this PR does
add a new endpoint, `GET /maintenance-mode/`, which returns either a
string message pulled from the
`CURRENTLY_UNDERGOING_MAINTENANCE_MESSAGE` env var, or `None` + update
the UI to conditionally show this message if it is set
<img width="1321" alt="Screenshot 2023-05-10 at 11 28 16"
src="https://github.com/grafana/oncall/assets/9406895/833a77fb-3a90-4f9f-88d6-dae0d98d99d4">
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required) (N/A)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
# What this PR does
## Which issue(s) this PR fixes
## Checklist
- [ ] Unit, integration, and e2e (if applicable) tests updated
- [ ] Documentation added (or `pr:no public docs` PR label added if not
required)
- [ ] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
