Implement fin-hub T24-T26: ingest, runway, coupling, RaaS packaging

Add CSV importers, runway calculator, budget alerts, cross-hub coupling
emitters, finhub CLI, and raas-mvp-packaging docs with full test coverage.

src/fin_hub/ingest/_csv.py

@@ -0,0 +1,28 @@
+"""Shared CSV helpers."""
+
+from __future__ import annotations
+
+import csv
+from pathlib import Path
+
+
+def read_csv_rows(path: Path) -> list[dict[str, str]]:
+    text = path.read_text(encoding="utf-8-sig")
+    reader = csv.DictReader(text.splitlines())
+    return [{k.strip(): (v or "").strip() for k, v in row.items() if k} for row in reader]
+
+
+def pick(row: dict[str, str], *names: str) -> str:
+    lowered = {k.lower(): v for k, v in row.items()}
+    for name in names:
+        value = lowered.get(name.lower())
+        if value:
+            return value
+    return ""
+
+
+def parse_amount(value: str) -> float:
+    cleaned = value.replace("€", "").replace("EUR", "").replace(",", ".").strip()
+    if not cleaned:
+        return 0.0
+    return float(cleaned)