feat(store): summarization-mode methods + all-videos read

Add the store surface for summarization mode:
- SetAutoSummarize / GetAutoSummarize — per-user auto/manual toggle; an absent
  user reads as manual (the safe default).
- RequestSummarize — queue one video (summarize_requested=TRUE); ErrNotFound
  when the video is absent or not owned (RLS hides another user's row).
- RequestedVideoIDs / ClearSummarizeRequested — the run-loop side: load the
  queued set per pass (mirrors SeenVideoIDs), clear after summarizing.
- ListVideos / GetVideoRow — drive from the videos table LEFT JOIN summaries so
  discovered-but-unsummarized videos appear with empty summary fields. SummaryRow
  gains additive Summarized + SummarizeRequested fields; the summary-only reads
  are untouched.

RLS proof: rls_test.go gains a cross-user "queue B's video" write asserting it
touches zero rows (store-level scoping can't prove this — the test pool is a
superuser that bypasses RLS, same caveat documented there).

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

internal/adapters/store/summarize_mode_test.go

@@ -0,0 +1,126 @@
+package store_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+	"github.com/stretchr/testify/require"
+
+	"gitea.d-ma.be/mathias/tapir/internal/adapters/store"
+)
+
+// seedBareVideo inserts a videos row with no summary, so the all-videos read and
+// the manual-queue flag can be exercised without a delivered summary.
+func seedBareVideo(t *testing.T, p *pgxpool.Pool, userID, videoID, title string) {
+	t.Helper()
+	_, err := p.Exec(context.Background(),
+		`INSERT INTO users (id) VALUES ($1) ON CONFLICT (id) DO NOTHING`, userID)
+	require.NoError(t, err)
+	_, err = p.Exec(context.Background(),
+		`INSERT INTO videos (id, user_id, provider, provider_video_id, title)
+		 VALUES ($1, $2, 'youtube', $3, $4)`,
+		videoID, userID, "pv-"+videoID[:8], title)
+	require.NoError(t, err)
+}
+
+func TestAutoSummarizeRoundTripDefaultsFalse(t *testing.T) {
+	ctx := context.Background()
+	s := newStore(t)
+	resetDB(t, rawPool(t))
+
+	// Unknown / fresh user defaults to manual (false).
+	got, err := s.GetAutoSummarize(ctx, userA)
+	require.NoError(t, err)
+	require.False(t, got, "default mode is manual")
+
+	require.NoError(t, s.SetAutoSummarize(ctx, userA, true))
+	got, err = s.GetAutoSummarize(ctx, userA)
+	require.NoError(t, err)
+	require.True(t, got, "set to automatic round-trips")
+
+	require.NoError(t, s.SetAutoSummarize(ctx, userA, false))
+	got, err = s.GetAutoSummarize(ctx, userA)
+	require.NoError(t, err)
+	require.False(t, got, "set back to manual round-trips")
+}
+
+func TestRequestSummarizeSetsFlag(t *testing.T) {
+	ctx := context.Background()
+	s := newStore(t)
+	p := rawPool(t)
+	resetDB(t, p)
+	seedBareVideo(t, p, userA, videoX, "X Title")
+
+	require.NoError(t, s.RequestSummarize(ctx, userA, videoX))
+
+	requested, err := s.RequestedVideoIDs(ctx, userA)
+	require.NoError(t, err)
+	require.Equal(t, map[string]bool{videoX: true}, requested)
+
+	// Clearing drops it from the requested set.
+	require.NoError(t, s.ClearSummarizeRequested(ctx, userA, videoX))
+	requested, err = s.RequestedVideoIDs(ctx, userA)
+	require.NoError(t, err)
+	require.Empty(t, requested)
+}
+
+func TestRequestSummarizeMissingVideo(t *testing.T) {
+	ctx := context.Background()
+	s := newStore(t)
+	resetDB(t, rawPool(t))
+
+	err := s.RequestSummarize(ctx, userA, videoX)
+	require.ErrorIs(t, err, store.ErrNotFound, "queuing a non-existent video reports not found")
+}
+
+func TestListVideosReturnsSummarizedAndUnsummarized(t *testing.T) {
+	ctx := context.Background()
+	s := newStore(t)
+	p := rawPool(t)
+	resetDB(t, p)
+
+	// videoX: discovered AND summarized. videoY: discovered, not yet summarized.
+	seedBareVideo(t, p, userA, videoX, "Summarized One")
+	seedBareVideo(t, p, userA, videoY, "Pending One")
+	require.NoError(t, s.Deliver(ctx, summary(userA, videoX, "body x")))
+	require.NoError(t, s.RequestSummarize(ctx, userA, videoY))
+
+	rows, err := s.ListVideos(ctx, userA, 50)
+	require.NoError(t, err)
+	require.Len(t, rows, 2, "both summarized and unsummarized videos are listed")
+
+	byID := map[string]store.SummaryRow{}
+	for _, r := range rows {
+		byID[r.VideoID] = r
+	}
+
+	require.True(t, byID[videoX].Summarized)
+	require.Equal(t, "body x", byID[videoX].Summary)
+	require.False(t, byID[videoX].SummarizeRequested)
+
+	require.False(t, byID[videoY].Summarized, "no summary -> Summarized false")
+	require.Empty(t, byID[videoY].Summary, "unsummarized row has empty summary")
+	require.True(t, byID[videoY].SummarizeRequested, "queued video carries the flag")
+}
+
+func TestListVideosIsUserScoped(t *testing.T) {
+	ctx := context.Background()
+	s := newStore(t)
+	p := rawPool(t)
+	resetDB(t, p)
+	seedBareVideo(t, p, userA, videoX, "A only")
+
+	rows, err := s.ListVideos(ctx, userB, 50)
+	require.NoError(t, err)
+	require.Empty(t, rows, "user B must not see user A's videos")
+}
+
+func TestGetVideoRowNotFound(t *testing.T) {
+	ctx := context.Background()
+	s := newStore(t)
+	resetDB(t, rawPool(t))
+
+	_, err := s.GetVideoRow(ctx, userA, videoX)
+	require.ErrorIs(t, err, store.ErrNotFound)
+}