Name log fields, metrics and the Core Rule Set package for what they are (closes #192)

The first half of the naming audit: names now say what they are. `internal/waf` is `internal/coreruleset`. Log fields, the action `blocked_by_core_rule_set`, the metric and the alert event say Core Rule Set. Timings end `_ms`. Percentages say of what, as `rate_limit_percent` and `bytes_limit_percent`. Setting names follow in #234.

Judgement call: `blocked_by_core_rule_set`, not the audit's `core_rule_set_blocked`, to match `blocked_by_block_rule`.
Trips a reader: an existing state file holding `waf_blocked` or the anomaly scope `watch` stops the start and must be removed. `SWW_ALERT_EVENTS` listing `waf_block` must list `core_rule_set_match`.

Model: opus-5-5

internal/discriminator/discriminator_test.go

@@ -48,8 +48,8 @@ const (
 	reportStatus           = "status"
 	reportRequestBytes     = "request_bytes"
 	reportResponseBytes    = "response_bytes"
-	reportDuration         = "duration_total"
-	reportUpstreamDuration = "duration_upstream_total"
+	reportDuration         = "duration_total_ms"
+	reportUpstreamDuration = "duration_upstream_total_ms"
 )
 
 // Discriminator is a discriminator running for one test, on a clock set to midnight.
@@ -693,7 +693,7 @@ func TestQuestionUnderTheOwnPrefixIsDeniedWith404AfterTheChecks(t *testing.T) {
 		wantDisposition(t, got, http.StatusNotFound, discriminator.DispositionDeny)
 	}
 
-	wantLine(t, s.out.requestLine(t), http.StatusNotFound, requestlog.ActionAdmin)
+	wantLine(t, s.out.requestLine(t), http.StatusNotFound, requestlog.ActionOwnEndpoint)
 
 	got := s.ask(otherClient, discriminator.MetricsPath)
 	wantDisposition(t, got, http.StatusForbidden, discriminator.DispositionDeny)
@@ -725,9 +725,9 @@ func TestObserveModeRefusalAnsweredAllowCountsForTheErrorBurst(t *testing.T) {
 	}
 
 	lines := s.out.requestLines(t, 2)
-	if lines[0].LimitHit != "" || lines[1].LimitHit != requestlog.LimitHitErrorBurst {
+	if lines[0].LimitHit != "" || lines[1].LimitHit != requestlog.LimitHitMinuteRefusals {
 		t.Errorf("log lines have limit_hit %q and %q, want none and %q",
-			lines[0].LimitHit, lines[1].LimitHit, requestlog.LimitHitErrorBurst)
+			lines[0].LimitHit, lines[1].LimitHit, requestlog.LimitHitMinuteRefusals)
 	}
 }
 
@@ -744,9 +744,9 @@ func TestDeniedQuestionCountsForTheErrorBurst(t *testing.T) {
 	}
 
 	lines := s.out.requestLines(t, 2)
-	if lines[0].LimitHit != "" || lines[1].LimitHit != requestlog.LimitHitErrorBurst {
+	if lines[0].LimitHit != "" || lines[1].LimitHit != requestlog.LimitHitMinuteRefusals {
 		t.Errorf("log lines have limit_hit %q and %q, want none and %q",
-			lines[0].LimitHit, lines[1].LimitHit, requestlog.LimitHitErrorBurst)
+			lines[0].LimitHit, lines[1].LimitHit, requestlog.LimitHitMinuteRefusals)
 	}
 }
 
@@ -901,7 +901,7 @@ func TestDeniedRequestIsFinishedAtItsDecision(t *testing.T) {
 
 	got := s.report(discriminator.Report{
 		RequestID: denied.Header.Get(requestIDHeader), Status: http.StatusForbidden,
-		ResponseBytes: 1000, DurationTotal: 2,
+		ResponseBytes: 1000, DurationTotalMS: 2,
 	})
 	wantStatus(t, got, http.StatusNoContent)
 
@@ -935,7 +935,7 @@ func TestMetricsCountAnAllowedRequestFromItsReport(t *testing.T) {
 	got := s.report(discriminator.Report{
 		RequestID: id, Status: http.StatusBadGateway,
 		RequestBytes: bodyBytes, ResponseBytes: answerBytes,
-		DurationTotal: 5, DurationUpstreamTotal: 4,
+		DurationTotalMS: 5, DurationUpstreamTotalMS: 4,
 	})
 	wantStatus(t, got, http.StatusNoContent)
 
@@ -951,7 +951,8 @@ func TestMetricsCountAnAllowedRequestFromItsReport(t *testing.T) {
 	unscraped := startDiscriminator(t, "", map[string]string{metricsToken: token})
 
 	got = unscraped.report(discriminator.Report{
-		RequestID: unscraped.allowed(client), Status: http.StatusBadGateway, DurationTotal: 5,
+		RequestID: unscraped.allowed(client), Status: http.StatusBadGateway,
+		DurationTotalMS: 5,
 	})
 	wantStatus(t, got, http.StatusNoContent)
 	wantMetric(t, unscraped.metrics(),
@@ -1189,8 +1190,8 @@ func wantReportsFields(t *testing.T, line logLine) {
 	if line.DiscriminatorLine != requestlog.DiscriminatorLineReport ||
 		line.Status != http.StatusCreated ||
 		line.RequestBytes != bodyBytes || line.ResponseBytes != answerBytes ||
-		line.DurationTotal != 12.5 || line.DurationUpstreamTotal == nil ||
-		*line.DurationUpstreamTotal != 10.25 {
+		line.DurationTotalMS != 12.5 || line.DurationUpstreamTotalMS == nil ||
+		*line.DurationUpstreamTotalMS != 10.25 {
 		t.Errorf("the report's line lacks the report's fields: %+v", line.Line)
 	}
 }
@@ -1205,8 +1206,8 @@ func wantSameDecision(t *testing.T, reported, decided logLine) {
 	same.Status = decided.Status
 	same.RequestBytes = decided.RequestBytes
 	same.ResponseBytes = decided.ResponseBytes
-	same.DurationTotal = decided.DurationTotal
-	same.DurationUpstreamTotal = decided.DurationUpstreamTotal
+	same.DurationTotalMS = decided.DurationTotalMS
+	same.DurationUpstreamTotalMS = decided.DurationUpstreamTotalMS
 	same.Counts.MinuteBytes = decided.Counts.MinuteBytes
 	same.Counts.HourBytes = decided.Counts.HourBytes
 	same.Counts.DayBytes = decided.Counts.DayBytes
@@ -1224,7 +1225,7 @@ func wantDecisionsFields(t *testing.T, line logLine, id, query, accept string) {
 
 	if line.DiscriminatorLine != requestlog.DiscriminatorLineDecision ||
 		line.Status != http.StatusOK || line.ResponseBytes != 0 ||
-		line.DurationUpstreamTotal != nil || line.DurationChecks == nil ||
+		line.DurationUpstreamTotalMS != nil || line.DurationChecksMS == nil ||
 		line.RequestID != id || line.Query != query ||
 		!line.HasAuthorization || !line.HasCookie ||
 		line.RequestHeaders["accept"] != accept || len(line.RuleIDs) != 1 ||
@@ -1260,7 +1261,7 @@ func TestReportWritesTheLastLineWithTheDecisionsAndTheReportsFields(t *testing.T
 	got := s.report(discriminator.Report{
 		RequestID: id, Status: http.StatusCreated,
 		RequestBytes: bodyBytes, ResponseBytes: answerBytes,
-		DurationTotal: 12.5, DurationUpstreamTotal: 10.25,
+		DurationTotalMS: 12.5, DurationUpstreamTotalMS: 10.25,
 	})
 	wantStatus(t, got, http.StatusNoContent)
 
@@ -1305,7 +1306,7 @@ func TestEveryDeniedRequestsReportGetsItsLastLine(t *testing.T) {
 			0, requestlog.ActionClientDenied,
 		},
 		{"own prefix", nil, discriminator.HealthPath, http.StatusNotFound,
-			requestlog.ActionAdmin},
+			requestlog.ActionOwnEndpoint},
 	} {
 		t.Run(tc.name, func(t *testing.T) {
 			t.Parallel()
@@ -1317,7 +1318,7 @@ func TestEveryDeniedRequestsReportGetsItsLastLine(t *testing.T) {
 			do(t, req)
 
 			got := s.report(discriminator.Report{
-				RequestID: id, Status: tc.status, ResponseBytes: 8, DurationTotal: 3,
+				RequestID: id, Status: tc.status, ResponseBytes: 8, DurationTotalMS: 3,
 			})
 			wantStatus(t, got, http.StatusNoContent)
 
@@ -1325,8 +1326,8 @@ func TestEveryDeniedRequestsReportGetsItsLastLine(t *testing.T) {
 			wantLine(t, line, tc.status, tc.action)
 
 			if line.DiscriminatorLine != requestlog.DiscriminatorLineReport ||
-				line.RequestID != id || line.ResponseBytes != 8 || line.DurationTotal != 3 ||
-				line.DurationUpstreamTotal != nil {
+				line.RequestID != id || line.ResponseBytes != 8 || line.DurationTotalMS != 3 ||
+				line.DurationUpstreamTotalMS != nil {
 				t.Errorf("the report's line is %+v", line.Line)
 			}
 		})
@@ -1583,9 +1584,10 @@ func TestCoreRuleSetAlertNamesTheSite(t *testing.T) {
 	wantDisposition(t, got, http.StatusForbidden, discriminator.DispositionDeny)
 
 	waiting := s.queue.Snapshot().Waiting[alerts.DestinationWebhook]
-	if len(waiting) != 1 || waiting[0].Event != alerts.EventWAFBlock ||
+	if len(waiting) != 1 || waiting[0].Event != alerts.EventCoreRuleSetMatch ||
 		waiting[0].Host != siteA {
-		t.Errorf("alerts waiting are %+v, want a waf_block naming %s", waiting, siteA)
+		t.Errorf("alerts waiting are %+v, want a core_rule_set_match naming %s",
+			waiting, siteA)
 	}
 }