fix(policy): use the new logger for config validation messages

Signed-off-by: Xe Iaso <me@xeiaso.net>

docs/docs/CHANGELOG.md

@@ -27,7 +27,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Deprecate `report_as` in challenge configuration
 
-Previously Anubis let you lie to users about the difficulty of a challenge to interfere with operators of malicious scrapers as a psyops attack:
+Previously Anubis let you lie to users about the difficulty of a challenge to interfere with operators of malicious scrapers as a psychological attack:
 
 ```yaml
 bots:
@@ -42,9 +42,24 @@ bots:
       algorithm: slow # intentionally waste CPU cycles and time
 ```
 
-This has turned out to be a bad idea and has been removed.
+This has turned out to be a bad idea because it has caused massive user experience problems and has been removed. If you are using this setting, you will get a warning in your logs like this:
 
-If you are using this setting, you will get a warning in your logs. To remove this warning, remove this setting from your policy file.
+```json
+{
+  "time": "2025-11-25T23:10:31.092201549-05:00",
+  "level": "WARN",
+  "source": {
+    "function": "github.com/TecharoHQ/anubis/lib/policy.ParseConfig",
+    "file": "/home/xe/code/TecharoHQ/anubis/lib/policy/policy.go",
+    "line": 201
+  },
+  "msg": "use of deprecated report_as setting detected, please remove this from your policy file when possible",
+  "at": "config-validate",
+  "name": "mild-suspicion"
+}
+```
+
+To remove this warning, remove this setting from your policy file.
 
 ### Logging customization
 

lib/policy/policy.go

@@ -66,6 +66,29 @@ func ParseConfig(ctx context.Context, fin io.Reader, fname string, defaultDiffic
 	result := newParsedConfig(c)
 	result.DefaultDifficulty = defaultDifficulty
 
+	if c.Logging.Level != nil {
+		logLevel = c.Logging.Level.String()
+	}
+
+	switch c.Logging.Sink {
+	case config.LogSinkStdio:
+		result.Logger = internal.InitSlog(logLevel, os.Stderr)
+	case config.LogSinkFile:
+		out := &logrotate.Logger{
+			Filename:           c.Logging.Parameters.Filename,
+			FilenameTimeFormat: time.RFC3339,
+			MaxBytes:           c.Logging.Parameters.MaxBytes,
+			MaxAge:             c.Logging.Parameters.MaxAge,
+			MaxBackups:         c.Logging.Parameters.MaxBackups,
+			LocalTime:          c.Logging.Parameters.UseLocalTime,
+			Compress:           c.Logging.Parameters.Compress,
+		}
+
+		result.Logger = internal.InitSlog(logLevel, out)
+	}
+
+	lg := result.Logger.With("at", "config-validate")
+
 	for _, b := range c.Bots {
 		if berr := b.Valid(); berr != nil {
 			validationErrs = append(validationErrs, berr)
@@ -126,7 +149,7 @@ func ParseConfig(ctx context.Context, fin io.Reader, fname string, defaultDiffic
 
 		if b.ASNs != nil {
 			if !hasThothClient {
-				slog.Warn("You have specified a Thoth specific check but you have no Thoth client configured. Please read https://anubis.techaro.lol/docs/admin/thoth for more information", "check", "asn", "settings", b.ASNs)
+				lg.Warn("You have specified a Thoth specific check but you have no Thoth client configured. Please read https://anubis.techaro.lol/docs/admin/thoth for more information", "check", "asn", "settings", b.ASNs)
 				continue
 			}
 
@@ -135,7 +158,7 @@ func ParseConfig(ctx context.Context, fin io.Reader, fname string, defaultDiffic
 
 		if b.GeoIP != nil {
 			if !hasThothClient {
-				slog.Warn("You have specified a Thoth specific check but you have no Thoth client configured. Please read https://anubis.techaro.lol/docs/admin/thoth for more information", "check", "geoip", "settings", b.GeoIP)
+				lg.Warn("You have specified a Thoth specific check but you have no Thoth client configured. Please read https://anubis.techaro.lol/docs/admin/thoth for more information", "check", "geoip", "settings", b.GeoIP)
 				continue
 			}
 
@@ -154,7 +177,7 @@ func ParseConfig(ctx context.Context, fin io.Reader, fname string, defaultDiffic
 			}
 
 			if parsedBot.Challenge.Algorithm == "slow" {
-				slog.Warn("use of deprecated algorithm \"slow\" detected, please update this to \"fast\" when possible", "name", parsedBot.Name)
+				lg.Warn("use of deprecated algorithm \"slow\" detected, please update this to \"fast\" when possible", "name", parsedBot.Name)
 			}
 		}
 
@@ -171,17 +194,20 @@ func ParseConfig(ctx context.Context, fin io.Reader, fname string, defaultDiffic
 
 	for _, t := range c.Thresholds {
 		if t.Challenge != nil && t.Challenge.Algorithm == "slow" {
-			slog.Warn("use of deprecated algorithm \"slow\" detected, please update this to \"fast\" when possible", "name", t.Name)
+			lg.Warn("use of deprecated algorithm \"slow\" detected, please update this to \"fast\" when possible", "name", t.Name)
+		}
+
+		if t.Challenge != nil && t.Challenge.ReportAs != 0 {
+			lg.Warn("use of deprecated report_as setting detected, please remove this from your policy file when possible", "name", t.Name)
 		}
 
 		if t.Name == "legacy-anubis-behaviour" && t.Expression.String() == "true" {
 			if !warnedAboutThresholds.Load() {
-				slog.Warn("configuration file does not contain thresholds, see docs for details on how to upgrade", "fname", fname, "docs_url", "https://anubis.techaro.lol/docs/admin/configuration/thresholds/")
+				lg.Warn("configuration file does not contain thresholds, see docs for details on how to upgrade", "fname", fname, "docs_url", "https://anubis.techaro.lol/docs/admin/configuration/thresholds/")
 				warnedAboutThresholds.Store(true)
 			}
 
 			t.Challenge.Difficulty = defaultDifficulty
-			t.Challenge.ReportAs = defaultDifficulty
 		}
 
 		threshold, err := ParsedThresholdFromConfig(t)
@@ -206,27 +232,6 @@ func ParseConfig(ctx context.Context, fin io.Reader, fname string, defaultDiffic
 		validationErrs = append(validationErrs, config.ErrUnknownStoreBackend)
 	}
 
-	if c.Logging.Level != nil {
-		logLevel = c.Logging.Level.String()
-	}
-
-	switch c.Logging.Sink {
-	case config.LogSinkStdio:
-		result.Logger = internal.InitSlog(logLevel, os.Stderr)
-	case config.LogSinkFile:
-		out := &logrotate.Logger{
-			Filename:           c.Logging.Parameters.Filename,
-			FilenameTimeFormat: time.RFC3339,
-			MaxBytes:           c.Logging.Parameters.MaxBytes,
-			MaxAge:             c.Logging.Parameters.MaxAge,
-			MaxBackups:         c.Logging.Parameters.MaxBackups,
-			LocalTime:          c.Logging.Parameters.UseLocalTime,
-			Compress:           c.Logging.Parameters.Compress,
-		}
-
-		result.Logger = internal.InitSlog(logLevel, out)
-	}
-
 	if len(validationErrs) > 0 {
 		return nil, fmt.Errorf("errors validating policy config JSON %s: %w", fname, errors.Join(validationErrs...))
 	}