feat: add capture time overrides and apply in queries

packages/db/migrations/0005_asset_overrides.sql

@@ -0,0 +1,9 @@
+CREATE TABLE IF NOT EXISTS asset_overrides (
+  asset_id uuid PRIMARY KEY REFERENCES assets(id) ON DELETE CASCADE,
+  capture_ts_utc_override timestamptz,
+  capture_offset_minutes_override int,
+  created_at timestamptz NOT NULL DEFAULT now()
+);
+
+CREATE INDEX IF NOT EXISTS asset_overrides_capture_ts_idx
+  ON asset_overrides(capture_ts_utc_override);