feat. rebuild service in Go

Rebuild the Gitea Codex review bot from the product contract with a Go HTTP service, durable SQL queue, typed Gitea client, isolated runner, and deployment updates.

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

internal/store/sqlstore/sqlstore_test.go

@@ -0,0 +1,52 @@
+package sqlstore
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"gitea-codex-bot/internal/config"
+	"gitea-codex-bot/internal/domain"
+)
+
+func TestSQLiteMigrationsAndJobLifecycle(t *testing.T) {
+	settings := config.Settings{DatabaseURL: "sqlite://" + t.TempDir() + "/test.db"}
+	st, err := Open(settings)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer st.Close()
+	ctx := context.Background()
+	if err := st.Migrate(ctx); err != nil {
+		t.Fatal(err)
+	}
+	event := domain.WebhookEvent{EventName: "issue_comment", DeliveryID: "d1", Repo: "acme/repo", PRNumber: 9, HeadSHA: "abc123", CommentID: 11, CommentBody: "@codex review", Sender: "alice", PayloadSHA256: "digest"}
+	inserted, err := st.InsertWebhookEvent(ctx, event)
+	if err != nil || !inserted {
+		t.Fatalf("insert event: %v %v", inserted, err)
+	}
+	duplicate, err := st.InsertWebhookEvent(ctx, event)
+	if err != nil || duplicate {
+		t.Fatalf("duplicate event result: %v %v", duplicate, err)
+	}
+	job, err := st.EnqueueJob(ctx, event, domain.ParsedCommand{Name: "review", Raw: event.CommentBody, Mode: "summary"})
+	if err != nil {
+		t.Fatal(err)
+	}
+	claimed, run, err := st.ClaimNextJob(ctx, time.Now().UTC(), 5*time.Minute, 2)
+	if err != nil || claimed == nil || run == nil {
+		t.Fatalf("claim: %#v %#v %v", claimed, run, err)
+	}
+	result := domain.ReviewResult{Verdict: "correct", Confidence: 1, Summary: "ok", Findings: []domain.Finding{}}
+	if err := st.FinishJob(ctx, job.ID, run.ID, true, false, &result, nil); err != nil {
+		t.Fatal(err)
+	}
+	latest, err := st.LatestJob(ctx)
+	if err != nil || latest == nil || latest.Status != domain.JobSucceeded {
+		t.Fatalf("latest: %#v %v", latest, err)
+	}
+	remaining, err := st.CooldownRemaining(ctx, event.Repo, event.PRNumber, time.Minute)
+	if err != nil || remaining <= 0 {
+		t.Fatalf("cooldown: %d %v", remaining, err)
+	}
+}