feat: upload audio, get a private Swedish transcript, discuss it (#33, ADR-033) (#39)

Upload a recording (audio, or video with the camera off), get a private Swedish transcript, and chat about it.

- ADR-033: RLS-scoped private transcript store; ffprobe/ffmpeg intake; gateway transcription (iguana kb-whisper, berget fallback); in-process single-replica worker; chat over the transcript (local models only).
- ADR-034: optional two-engine mode (pianissimo + kb-whisper) reconciled by a LOCAL model; off unless TAPIR_RECONCILE_BASE_MODEL is set.
- ADR-035: real progress (phases, running/quiet/lost), phase logging, every judged spot stored, merged segments.
- Hardening from four adversarial reviews: errors logged and stored as kinds never text; per-engine deadlines; converted-length check; bounded queue; client hang-ups are not errors; strict local-alias check.
- Dockerfile: static ffmpeg/ffprobe 7.0.2 pinned by sha256 (#34). Built and inspected by hand; CI does not build the image on a PR, so its first CI build is this merge.

Uploads stay OFF until TAPIR_UPLOADS_ENABLED is set in the deployment.

Closes #33, #34, #42, #43, #44.

Co-authored-by: Mathias <mthbqv@gmail.com>

internal/reconcile/reconcile_reason_test.go

@@ -0,0 +1,33 @@
+package reconcile_test
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"git.d-ma.be/mathias/tapir/internal/domain"
+	"git.d-ma.be/mathias/tapir/internal/reconcile"
+)
+
+// The reason a reconciliation was skipped is stored and shown on a page about a private
+// recording, so it carries a kind, never the model's error text, which can echo the
+// prompt (adversarial review F3).
+
+func TestReconcile_TheBreakerReasonCarriesAKindNotTheModelsText(t *testing.T) {
+	adj := &scripted{fn: func(int, reconcile.Request) (reconcile.Verdict, error) {
+		return reconcile.VerdictBase, errors.New("gateway echoed the prompt: zebrakaka secret words")
+	}}
+	small := opts
+	small.BreakAfter = 2
+
+	out, err := reconcile.Reconcile(context.Background(), tr(progBase), tr(progAlt), adj, small)
+
+	require.NoError(t, err)
+	require.Equal(t, domain.ReconcileSkipped, out.Reconciliation.Status)
+	assert.NotContains(t, out.Reconciliation.Reason, "zebrakaka", "provider text must not be stored or shown")
+	assert.Contains(t, out.Reconciliation.Reason, "2 times in a row", "the reason still says what happened")
+	assert.Contains(t, out.Reconciliation.Reason, "error", "and carries a kind")
+}