Add machine-aware maximum product length

mcp_server.py

@@ -6,6 +6,7 @@ from typing import Any
 
 from rollcalc_mcp_tools import (
     analyze_transport_capacity_result,
+    calculate_machine_max_product_length_result,
     calculate_material_weight_result,
     calculate_product_length_result,
     calculate_roll_diameter_result,
@@ -62,6 +63,25 @@ def create_server() -> Any:
             line_speed_m_per_min=line_speed_m_per_min,
         )
 
+    @server.tool()
+    def calculate_machine_max_product_length(
+        machine: str,
+        core_diameter_mm: float,
+        thickness_mm: float,
+        thickness_stddev_mm: float | None = None,
+        product_width_m: float | None = None,
+        area_weight_g_m2: float | None = None,
+    ) -> dict[str, Any]:
+        """Calculate deterministic maximum product length for a configured production machine. Use this for maximum roll/product length, how much product fits on a machine roll, or maximum length without a diameter warning. Resolve the article first with search_articles/get_article when needed, then pass its thickness, thickness standard deviation, width, and area weight exactly. Do not supply or invent machine limits, rearrange roll or weight formulas, calculate a weight-limited length, or compare candidate limits yourself: this tool returns nominal and conservative/no-warning production maxima and their governing constraints. Report incompatibility rather than substituting another core or width, and ask for returned missing inputs rather than inventing them."""
+        return calculate_machine_max_product_length_result(
+            machine=machine,
+            core_diameter_mm=core_diameter_mm,
+            thickness_mm=thickness_mm,
+            thickness_stddev_mm=thickness_stddev_mm,
+            product_width_m=product_width_m,
+            area_weight_g_m2=area_weight_g_m2,
+        )
+
     @server.tool()
     def calculate_material_weight(
         roll_length_m: float,