Merge branch 'feature/api-06-wiederanlauf-nachsynchronisierung-nach-core-ausfall' into feature/qa-05-abnahme-compliance-pruefung-core

# Conflicts:
#	go.mod
#	internal/moduletrust/cache.go

migrations/0006_resync_buffers.down.sql

@@ -0,0 +1,2 @@
+DROP TABLE resync_usage_buffer;
+DROP TABLE resync_audit_buffer;

migrations/0006_resync_buffers.up.sql

@@ -0,0 +1,22 @@
+-- Wiederanlauf & Nachsynchronisierung nach Core-Ausfall (API-06, siehe
+-- core-kanban/tickets/API-06.md) — lokale, PERSISTENTE Pufferqueue (kein
+-- In-Memory) fuer Audit-Events und Nutzungszaehler-Deltas eines Moduls.
+CREATE TABLE resync_audit_buffer (
+    id          BIGSERIAL PRIMARY KEY,
+    seq         BIGSERIAL,
+    tenant_slug TEXT NOT NULL,
+    actor       TEXT NOT NULL,
+    action      TEXT NOT NULL,
+    target      TEXT NOT NULL DEFAULT '',
+    metadata    JSONB NOT NULL DEFAULT '{}',
+    created_at  TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE TABLE resync_usage_buffer (
+    id          BIGSERIAL PRIMARY KEY,
+    seq         BIGSERIAL,
+    tenant_slug TEXT NOT NULL,
+    metric      TEXT NOT NULL,
+    delta       BIGINT NOT NULL,
+    created_at  TIMESTAMPTZ NOT NULL DEFAULT now()
+);