Add OARMP routing engine, dashboard and documentation

- Complete routing engine: ingest, optimizer (CG+B&B), maintenance
  monitor, metrics, pipeline, quality checks
- Streamlit dashboard with Input/Output tab structure, editable data
  editors, interactive Folium map with satellite layer and maintenance
  base highlights, FH stacked bar chart with TTM availability
- CSV data files: AERONAVES, CHECKS, AIRPORTS, ESCALA DE VOO
- README, CONTEXTO and CHANGELOG added
- Remove legacy pre_process scripts and raw binary files (PDFs/xlsx)
- Update .gitignore to exclude outputs/, data/, raw/*.pdf, raw/*.xlsx

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/04_generate_flight_strings.py

@@ -0,0 +1,75 @@
+"""
+Script 04 – Generate and export flight strings.
+
+Reads the saved solution CSVs and generates a per-aircraft "flight string"
+report in human-readable format (console + Excel export).
+"""
+
+import sys
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(ROOT))
+
+import pandas as pd
+
+from src.routing_engine.config import DEFAULT_CONFIG
+
+cfg = DEFAULT_CONFIG
+
+sched_path = cfg.schedules_dir / "flight_strings.csv"
+maint_path = cfg.schedules_dir / "maintenance_events.csv"
+
+if not sched_path.exists():
+    print("No schedule found. Run script 03 first.")
+    sys.exit(1)
+
+sched = pd.read_csv(sched_path, parse_dates=["departure", "arrival"])
+maint = pd.read_csv(maint_path, parse_dates=["maint_start", "maint_end"]) if maint_path.exists() else pd.DataFrame()
+
+print("=" * 70)
+print("FLIGHT STRINGS PER AIRCRAFT")
+print("=" * 70)
+
+for aircraft, group in sched.groupby("aircraft"):
+    print(f"\n{'-'*70}")
+    print(f"  Aeronave: {aircraft}")
+    print(f"{'-'*70}")
+
+    total_fh = 0.0
+    for _, row in group.sort_values("departure").iterrows():
+        maint_flag = " <- MANUTENCAO ANTES" if row.get("maintenance_before") else ""
+        dep = pd.to_datetime(row["departure"])
+        arr = pd.to_datetime(row["arrival"])
+        fh = float(row.get("flight_hours", 0))
+        total_fh += fh
+        print(
+            f"    {row['ofrag_id']:12s}  "
+            f"{dep.strftime('%d/%m %H:%M')} -> {arr.strftime('%d/%m %H:%M')}  "
+            f"({fh:.2f} FH){maint_flag}"
+        )
+
+    print(f"    {'TOTAL':12s}  {total_fh:.2f} FH")
+
+    if not maint.empty:
+        ac_maint = maint[maint["aircraft"] == aircraft]
+        if not ac_maint.empty:
+            print(f"\n  Eventos de manutencao:")
+            for _, ev in ac_maint.iterrows():
+                print(
+                    f"    CHECK (ciclo {int(ev['check_cycle_index'])})  "
+                    f"{pd.to_datetime(ev['maint_start']).strftime('%d/%m %H:%M')} -> "
+                    f"{pd.to_datetime(ev['maint_end']).strftime('%d/%m %H:%M')}  "
+                    f"TTM perdido: {ev['ttm_loss_hours']:.2f} FH"
+                )
+
+# Export to Excel
+out_xlsx = cfg.exports_dir / "flight_strings.xlsx"
+try:
+    with pd.ExcelWriter(out_xlsx, engine="openpyxl") as writer:
+        sched.to_excel(writer, sheet_name="Escala", index=False)
+        if not maint.empty:
+            maint.to_excel(writer, sheet_name="Manutencao", index=False)
+    print(f"\n\nExportado para Excel -> {out_xlsx}")
+except ImportError:
+    print("\n(openpyxl not installed – Excel export skipped)")