refactor: rename package fabledassistant -> scribe (code-only)

Renames src/fabledassistant -> src/scribe and all imports, plus the
default DB name and DB user/password (fabled -> scribe) in config +
compose. 952 refs / 154 files. Reverses the old 'internal name stays
fabledassistant' convention.

Code-only: live databases are still physically named 'fabledassistant'.
Deployed environments must set POSTGRES_DB / POSTGRES_USER (or rename the
DB) since the defaults now resolve to 'scribe'. Repo (FabledScribe), git
host (fabledsword), MCP (fabled-git) and the image name (fabledscribe)
are intentionally unchanged.

ruff check src/ clean locally; CI (typecheck + pytest) is the gate.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/scribe/routes/utils.py

@@ -0,0 +1,24 @@
+from datetime import date
+
+from quart import jsonify, request
+
+
+def not_found(resource: str = "Item"):
+    return jsonify({"error": f"{resource} not found"}), 404
+
+
+def parse_iso_date(value: str | None, field: str = "date"):
+    """Parse an ISO date string. Returns a date, None, or a (response, 400) tuple."""
+    if not value:
+        return None
+    try:
+        return date.fromisoformat(value)
+    except ValueError:
+        return jsonify({"error": f"Invalid {field} format. Use YYYY-MM-DD."}), 400
+
+
+def parse_pagination(default_limit: int = 50, max_limit: int = 500) -> tuple[int, int]:
+    """Extract and clamp ``limit`` / ``offset`` from the current request's query string."""
+    limit = min(request.args.get("limit", default_limit, type=int), max_limit)
+    offset = request.args.get("offset", 0, type=int)
+    return limit, offset