fix: handle missing aircraft and engine data in conversion process

feat: add combine_historical_faa.py to process historical FAA data

src/combine_historical_faa.py

@@ -0,0 +1,14 @@
+#unique_regulatory_id
+# 1. read historoical and output
+# 2. read sequentially
+
+# Instead of reading all csvs I can read just the latest release csv to get everything.
+
+from pathlib import Path
+
+base = Path("data/faa_releasable_historical")
+for day_dir in sorted(base.glob("2024-02-*")):
+    master = day_dir / "Master.txt"
+    if master.exists():
+        out_csv = master_txt_to_releasable_csv(master, out_dir="data/faa_releasable_historical_csv")
+        print(day_dir.name, "->", out_csv)