fix(httpclient): replace DefaultClient with timed clients and retry

Пакет httpclient: timeout 45s, idle pool, DoWithRetry. Scheduler и nodecli
используют retry; pipeline/asnresolve/jobs — httpclient.New вместо DefaultClient.

Co-authored-by: Cursor <[email protected]>

internal/pipeline/refresh.go

@@ -19,6 +19,7 @@ import (
 	"time"
 
 	"evobgp/internal/birdfmt"
+	"evobgp/internal/httpclient"
 	"evobgp/internal/observability"
 	"evobgp/internal/store"
 
@@ -50,7 +51,7 @@ func MaterializedASPrefixKey(asn int64) string {
 // It does not create a new config revision.
 func RefreshModuleIngest(ctx context.Context, st store.Backend, hc *http.Client, tenantID, moduleID string) error {
 	if hc == nil {
-		hc = http.DefaultClient
+		hc = httpclient.New(httpclient.DefaultTimeout)
 	}
 	start := time.Now()
 	mod, err := st.GetModule(tenantID, moduleID)
@@ -84,7 +85,7 @@ func RefreshModuleIngest(ctx context.Context, st store.Backend, hc *http.Client,
 // If materialized prefixes are unchanged, returns latest revision id without creating a duplicate.
 func RenderTenantRevision(ctx context.Context, st store.Backend, hc *http.Client, tenantID, triggerModuleID string) (revisionID string, err error) {
 	if hc == nil {
-		hc = http.DefaultClient
+		hc = httpclient.New(httpclient.DefaultTimeout)
 	}
 	agg, err := aggregateTenantPrefixRowsAll(ctx, st, hc, tenantID)
 	if err != nil {
@@ -117,7 +118,7 @@ func RenderTenantRevision(ctx context.Context, st store.Backend, hc *http.Client
 func RenderTenantRevisionFromPrefixes(ctx context.Context, st store.Backend, hc *http.Client, tenantID, triggerModuleID string, rows []store.PrefixRow) (revisionID string, err error) {
 	_ = ctx
 	if hc == nil {
-		hc = http.DefaultClient
+		hc = httpclient.New(httpclient.DefaultTimeout)
 	}
 	agg := append([]store.PrefixRow(nil), rows...)
 	rawCount := len(agg)