P4: contrib/store — persona SQLite store (JSON-blob round-trip)

db.Personas() satisfies persona.Storage over SQLite. Each Agent is stored as a
JSON blob with extracted indexed columns (owner_id, name, webhook_secret,
chatbot_channel_filter, schedule, next_run_at) — so the WHOLE struct round-trips
(no domain<->GORM<->DB field-loss footgun) while the lookups stay indexable.

Test proves the round-trip preserves nested + map fields (SkillPalette,
StateReactEmoji), the owner/name + webhook + chatbot-filter queries, the
scheduled-due query, and MarkAgentScheduledRun clearing the due window.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

contrib/store/persona_store_test.go

@@ -0,0 +1,71 @@
+package store
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"gitea.stevedudenhoeffer.com/steve/executus/persona"
+)
+
+func TestSQLitePersonaStore(t *testing.T) {
+	ctx := context.Background()
+	db, err := Open(":memory:")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+	st := db.Personas()
+	if err := st.InitializeAgentStorage(ctx); err != nil {
+		t.Fatal(err)
+	}
+
+	// Full struct round-trips through the JSON blob (incl. nested + map fields).
+	a := &persona.Agent{
+		ID: "a1", Name: "helper", OwnerID: "o1", SystemPrompt: "be nice",
+		ModelTier: "fast", SkillPalette: []string{"animate"},
+		StateReactEmoji:      map[string]string{"running": "⏳"},
+		ChatbotChannelFilter: "general",
+	}
+	if err := st.SaveAgent(ctx, a); err != nil {
+		t.Fatal(err)
+	}
+	got, err := st.GetAgent(ctx, "a1")
+	if err != nil || got.SystemPrompt != "be nice" || len(got.SkillPalette) != 1 ||
+		got.StateReactEmoji["running"] != "⏳" {
+		t.Fatalf("round-trip lost fields: %+v (err %v)", got, err)
+	}
+	if byName, err := st.GetAgentByName(ctx, "o1", "helper"); err != nil || byName.ID != "a1" {
+		t.Fatalf("GetAgentByName: %v %+v", err, byName)
+	}
+	if cf, _ := st.ListAgentsByChatbotChannelFilter(ctx); len(cf) != 1 {
+		t.Errorf("ListAgentsByChatbotChannelFilter = %d, want 1", len(cf))
+	}
+
+	// Scheduling: due query + MarkAgentScheduledRun round-trip.
+	now := time.Now().UTC()
+	sched := &persona.Agent{ID: "s1", Name: "cron", OwnerID: "o1", Schedule: "0 * * * *"}
+	due := now.Add(-time.Minute)
+	sched.NextRunAt = &due
+	if err := st.SaveAgent(ctx, sched); err != nil {
+		t.Fatal(err)
+	}
+	dueList, _ := st.ListScheduledAgents(ctx, now)
+	if len(dueList) != 1 || dueList[0].ID != "s1" {
+		t.Fatalf("ListScheduledAgents = %+v", dueList)
+	}
+	next := now.Add(time.Hour)
+	if err := st.MarkAgentScheduledRun(ctx, "s1", now, next); err != nil {
+		t.Fatal(err)
+	}
+	if again, _ := st.ListScheduledAgents(ctx, now); len(again) != 0 {
+		t.Errorf("after MarkAgentScheduledRun, nothing should be due before now: %+v", again)
+	}
+
+	if err := st.DeleteAgent(ctx, "a1"); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := st.GetAgent(ctx, "a1"); err != persona.ErrNotFound {
+		t.Errorf("GetAgent after delete = %v, want ErrNotFound", err)
+	}
+}