Initial NTE history exporter

Initial NTE history exporter

Add a Windows live-capture exporter for NTE pull history with support for
Permanent Monopoly, Limited Monopoly, and Arc Miracle Box histories.

Included:
- live packet capture via Windows raw sockets
- CSV and JSON export generation
- normalized reward and banner mapping files
- Monopoly v7 Points Gift / Chase Reward classification
- Arc Miracle Box decoding with shared pity metadata
- timestamp grouping and UID generation
- Windows launcher scripts with admin prompting
- docs for usage, export format, limitations, and packet notes
- tests covering decoder behaviour and mapping consistency

Generated exports, captures, briefs, and local data are ignored for privacy.

docs/export-format.md

@@ -0,0 +1,53 @@
+# Export Format
+
+The sanitized JSON export uses:
+
+```json
+{
+  "format": "nte-history-export",
+  "format_version": 1,
+  "game": "Neverness to Everness",
+  "source": "packet_capture",
+  "exporter": {
+    "name": "nte-history-exporter",
+    "version": "0.1.0"
+  },
+  "banner": {
+    "id": "Lottery_Permanent",
+    "name": "Standard Board",
+    "system": "Monopoly",
+    "shared_pity": false
+  },
+  "scan": {
+    "mode": "stable_only",
+    "boundary_policy": "drop_incomplete_timestamp_groups",
+    "decoded_records": 0,
+    "exported_records": 0,
+    "skipped_records": 0,
+    "warnings": []
+  },
+  "records": []
+}
+```
+
+Record UIDs are deterministic:
+
+Monopoly:
+
+```text
+nte|monopoly|Lottery_Permanent|timestamp_raw|timestamp_group_ordinal|roll_result|reward_key_hex|quantity
+```
+
+Limited character records use `Lottery_LimitedCharacter` in the same UID source position.
+
+Arc:
+
+```text
+nte|gashapon|Arc_MiracleBox|timestamp_raw|timestamp_group_ordinal|reward_key_hex
+```
+
+The final UID is `sha256(source).hexdigest()[0:32]`.
+
+Each record includes `pool_group_id`. Arc records use the shared `reward_*` fields and include `source_type: "miracle_box"`.
+
+Normal JSON exports do not include raw packets or capture-only metadata.