Breaking API Change:
> The presence of the `ip` field on `codersdk.ConnectionLog` cannot be
guaranteed, and so the field has been made optional. It may be omitted
on API responses.
When running a scaletest, I noticed logs of the form:
```
2025-09-12 06:34:10.924 [erro] coderd.workspaceapps: upsert connection log failed trace=0xa17580 span=0xa17620 workspace_id=81b937d7-5777-4df5-b5cb-80241f30326f agent_id=78b2ff6d-b4a6-4a4e-88a7-283e05455a88 app_id=00000000-0000-0000-0000-000000000000 user_id=00000000-0000-0000-0000-000000000000 user_agent="" app_slug_or_port=terminal status_code=404 request_id=67f03cf8-9523-444a-97bc-90de080a54c8 ...
error= 1 error occurred:
* pq: null value in column "ip" of relation "connection_logs" violates not-null constraint
```
to ensure logs are never omitted from the connection log due to a
missing IP again (i.e. I'm not sure if we can always rely on a valid,
parseable, IP from `(http.Request).RemoteAddr`), I've removed the `NOT
NULL` constraint on `ip` on `connection_logs`, and made `ip` on the API
response optional.
The specific cause for these null IPs was the
`/workspaceproxies/me/issue-signed-app-token [post]` endpoint
constructing it's own `http.Request` without a `RemoteAddr` set, and
then passing that to the token issuer.
To solve this, we'll have workspace proxies send the real IP of the
client when calling `/workspaceproxies/me/issue-signed-app-token [post]`
via the header `Coder-Workspace-Proxy-Real-IP`.
This is the second PR for moving connection events out of the audit log.
This PR:
- Adds the `/api/v2/connectionlog` endpoint
- Adds filtering for `GetAuthorizedConnectionLogsOffset` and thus the endpoint.
There's quite a few, but I was aiming for feature parity with the audit log.
1. `organization:<id|name>`
2. `workspace_owner:<username>`
3. `workspace_owner_email:<email>`
4. `type:<ssh|vscode|jetbrains|reconnecting_pty|workspace_app|port_forwarding>`
5. `username:<username>`
- Only includes web-based connection events (workspace apps, web port forwarding) as only those include user metadata.
6. `user_email:<email>`
7. `connected_after:<time>`
8. `connected_before:<time>`
9. `workspace_id:<id>`
10. `connection_id:<id>`
- If you have one snapshot of the connection log, and some sessions are ongoing in that snapshot, you could use this filter to check if they've been closed since.
11. `status:<connected|disconnected>`
- If `connected` only sessions with a null `close_time` are returned, if `disconnected`, only those with a non-null `close_time`. If filter is omitted, both are returned.
Future PRs:
- Populate `count` on `ConnectionLogResponse` using a seperate query (to preemptively mitigate the issue described in #17689)
- Implement a table in the Web UI for viewing connection logs.
- Write a query to delete old events from the audit log, call it from dbpurge.
- Write documentation for the endpoint / feature (including these filters)
Ethan