Add Fleet Torrent erasure extension with shard DHT and gossip.

Content-addressed shard DHT on seeder agents with subnet_primary_seeder election, cross-subnet fleet_torrent_gossip, BGP swarm magnets, C2 torrent manifest, and k-of-n peer fetch with C2 fallback.

server/internal/api/oath_ledger_test.go

@@ -0,0 +1,59 @@
+package api
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"crypto-miner-server/internal/db"
+	"crypto-miner-server/internal/pool"
+)
+
+func TestGetOathLedgerLimit(t *testing.T) {
+	database, err := db.New(t.TempDir())
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = database.Close() })
+
+	bridge := &OathLedgerBridge{DB: database}
+	if err := bridge.Record("comrade", db.OathGraft, "tgt-1", "#ff00aa", db.OathOutcomeSuccess,
+		map[string]string{"source": "src-1"}, map[string]string{"graft_tier": "dns_txt"}); err != nil {
+		t.Fatal(err)
+	}
+
+	fh := NewFleetHandler(database, nil, nil, nil, nil, pool.Config{}, t.TempDir())
+	req := httptest.NewRequest(http.MethodGet, "/api/v1/fleet/oath-ledger?limit=5", nil)
+	rec := httptest.NewRecorder()
+	fh.GetOathLedger(rec, req)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("status = %d body=%s", rec.Code, rec.Body.String())
+	}
+	var rows []db.OathLedgerEntry
+	if err := json.Unmarshal(rec.Body.Bytes(), &rows); err != nil {
+		t.Fatal(err)
+	}
+	if len(rows) != 1 || rows[0].ActionType != db.OathGraft || rows[0].Actor != "comrade" {
+		t.Fatalf("unexpected rows: %+v", rows)
+	}
+}
+
+func TestOathLedgerBridgePersistsCourtRow(t *testing.T) {
+	database, err := db.New(t.TempDir())
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = database.Close() })
+	hub := NewWSHub(database)
+
+	bridge := &OathLedgerBridge{DB: database, Hub: hub}
+	if err := bridge.Record("ai_council:judge", db.OathCourtL4Decision, "a1", "", db.OathOutcomeSuccess,
+		map[string]string{"verdict": "retry"}, map[string]string{"executed": "spread_now"}); err != nil {
+		t.Fatal(err)
+	}
+	rows, err := database.ListOathLedger(1)
+	if err != nil || len(rows) != 1 || rows[0].ActionType != db.OathCourtL4Decision {
+		t.Fatalf("db rows: %+v err=%v", rows, err)
+	}
+}