Store and show an event's query string, and pass it on to an HTTP target when set (closes #312)

The receiver keeps the query string of the request it received on the event, in a new `raw_query` column of the per-webhook `events` table; a resubmitted copy carries its original's. The event log and the event's page show it with the request, the event log leaving out one over 32 KiB as it does request headers. The archive and log targets carry it. An HTTP target gets a `forwardQuery` setting, off by default, on both target forms and in the target list: on, each delivery, replays and resubmits included, appends the query string to the target URL, joined with `&` to one it already has.

Model: opus-5-5

internal/handlers/event_resubmit_test.go

@@ -22,9 +22,13 @@ import (
 // dispatches to it: the notifier is recorded, not run.
 const resubmitTargetURL = "http://93.184.216.34/hook"
 
-// resubmitEventHeaders is the stored header JSON a seeded event
-// carries, so a test can prove the copy takes it verbatim.
-const resubmitEventHeaders = `{"X-Test":["yes"],"X-Trace":["abc"]}`
+// resubmitEventHeaders and resubmitEventQuery are the stored header
+// JSON and query string a seeded event carries, so a test can prove the
+// copy takes them verbatim.
+const (
+	resubmitEventHeaders = `{"X-Test":["yes"],"X-Trace":["abc"]}`
+	resubmitEventQuery   = "a=1&b=2"
+)
 
 // seedStoredEvent records one event in a webhook's own database with
 // no deliveries at all, which is the state a captured event is in when
@@ -43,6 +47,7 @@ func seedStoredEvent(
 		WebhookID:    webhookID,
 		EntrypointID: "entrypoint-" + webhookID,
 		Method:       http.MethodPost,
+		RawQuery:     resubmitEventQuery,
 		Headers:      resubmitEventHeaders,
 		Body:         body,
 		ContentType:  contentTypeJSON,
@@ -202,6 +207,7 @@ func assertEventCopy(
 	t.Helper()
 
 	assert.Equal(t, original.Method, fresh.Method)
+	assert.Equal(t, resubmitEventQuery, fresh.RawQuery)
 	assert.Equal(t, original.Headers, fresh.Headers)
 	assert.Equal(t, original.Body, fresh.Body)
 	assert.Equal(t, int64(len(original.Body)), fresh.BodyBytes)
@@ -236,6 +242,7 @@ func assertResubmitTask(
 	assert.Equal(t, target.ID, task.TargetID)
 	assert.Equal(t, target.Type, task.TargetType)
 	assert.Equal(t, fresh.Method, task.Method)
+	assert.Equal(t, fresh.RawQuery, task.RawQuery)
 	assert.Equal(t, fresh.Headers, task.Headers)
 	assert.Equal(t, fresh.ContentType, task.ContentType)
 	assert.Equal(t, 1, task.AttemptNum)