feat(jobs): wire mcp_tokens_purge runner into jobs.Module

- Config.MCPTokensPurge + scheduleEntry branch
- app.go constructs runner with mcpTokensPurgeAdapter
- Registered as 'mcp_tokens_purge' in RunnerFns map

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

internal/app/app.go

@@ -404,6 +404,8 @@ func New(ctx context.Context, cfg *config.Config, dist embed.FS) (*App, error) {
 	jobPurgeRunner := runners.NewJobPurge(jobsRepo, cfg.Jobs.JobPurge.CompletedRetention, log)
 	acpEventsPurgeRunner := runners.NewAcpEventsPurge(
 		acpEventsPurgeAdapter{repo: acpRepo}, cfg.Jobs.AcpEventsPurge.Retention, log)
+	mcpTokensPurgeRunner := runners.NewMCPTokensPurge(
+		mcpTokensPurgeAdapter{repo: mcpRepo}, cfg.Jobs.MCPTokensPurge.Retention, log)
 
 	deadLetterFn := func(ctx context.Context, job jobs.Job, herr error) {
 		errMsg := herr.Error()
@@ -479,6 +481,11 @@ func New(ctx context.Context, cfg *config.Config, dist embed.FS) (*App, error) {
 			Interval:  cfg.Jobs.AcpEventsPurge.Interval,
 			Retention: cfg.Jobs.AcpEventsPurge.Retention,
 		},
+		MCPTokensPurge: jobs.MCPTokensPurgeConfig{
+			Enabled:   cfg.Jobs.MCPTokensPurge.Enabled,
+			Interval:  cfg.Jobs.MCPTokensPurge.Interval,
+			Retention: cfg.Jobs.MCPTokensPurge.Retention,
+		},
 	}, jobs.ModuleDeps{
 		Repo: jobsRepo,
 		Handlers: map[jobs.JobType]jobs.Handler{
@@ -491,6 +498,7 @@ func New(ctx context.Context, cfg *config.Config, dist embed.FS) (*App, error) {
 			"job_reaper":         jobReaperRunner.Run,
 			"job_purge":          jobPurgeRunner.Run,
 			"acp_events_purge":   acpEventsPurgeRunner.Run,
+			"mcp_tokens_purge":   mcpTokensPurgeRunner.Run,
 		},
 		Clock:         clock.Real(),
 		Log:           log,
@@ -848,3 +856,11 @@ type acpEventsPurgeAdapter struct{ repo acp.Repository }
 func (a acpEventsPurgeAdapter) PurgeEventsBefore(ctx context.Context, before time.Time) (int64, error) {
 	return a.repo.PurgeEventsBefore(ctx, before)
 }
+
+// mcpTokensPurgeAdapter exposes mcp.Repository.PurgeExpired as the narrow
+// interface required by runners.MCPTokensPurge.
+type mcpTokensPurgeAdapter struct{ repo mcp.Repository }
+
+func (a mcpTokensPurgeAdapter) PurgeExpired(ctx context.Context, before time.Time) (int64, error) {
+	return a.repo.PurgeExpired(ctx, before)
+}

internal/jobs/domain.go

@@ -127,6 +127,13 @@ type AcpEventsPurgeConfig struct {
 	Retention time.Duration
 }
 
+// MCPTokensPurgeConfig extends RunnerConfig with mcp_tokens retention.
+type MCPTokensPurgeConfig struct {
+	Enabled   bool
+	Interval  time.Duration
+	Retention time.Duration
+}
+
 // Config is the full jobs.Module configuration.
 type Config struct {
 	Enabled           bool
@@ -138,4 +145,5 @@ type Config struct {
 	JobReaper         JobReaperConfig
 	JobPurge          JobPurgeConfig
 	AcpEventsPurge    AcpEventsPurgeConfig
+	MCPTokensPurge    MCPTokensPurgeConfig
 }

internal/jobs/module.go

@@ -131,6 +131,8 @@ func scheduleEntry(cfg Config, name string) (schedEntry, bool) {
 		return schedEntry{cfg.JobPurge.Interval, cfg.JobPurge.Enabled}, true
 	case "acp_events_purge":
 		return schedEntry{cfg.AcpEventsPurge.Interval, cfg.AcpEventsPurge.Enabled}, true
+	case "mcp_tokens_purge":
+		return schedEntry{cfg.MCPTokensPurge.Interval, cfg.MCPTokensPurge.Enabled}, true
 	}
 	return schedEntry{0, false}, false
 }