SIENTIAPDE-1430: Introduce static_threshold parameter for static window removal.

This parameter allows customizing the threshold (1-1000) used when rem_static_win is enabled, defaulting to 1 if null.
Updates include parameter definition, business rule validation, repository logic for passing the threshold, documentation in README.md and PIPELINE_PARAMS_CHANGELOG.md, and new unit and integration tests.

docs/test-scenarios/11-linear-regression-static-threshold-custom.json

@@ -0,0 +1,29 @@
+{
+  "_description": "Regressão linear com remoção de janelas estáticas e static_threshold customizado",
+  "experimentName": "test-linear-static-threshold",
+  "username": "bruno.domingues@aignosi.com.br",
+  "modelName": "Linear Regression",
+  "targetVariable": "03CV020/CORRENTE_N_M1_PV(Value)",
+  "variableColumns": ["303-WIT-200(Value)"],
+  "lagTrain": {"303-WIT-200(Value)": 0},
+  "lagVal": {"303-WIT-200(Value)": 0},
+  "remStaticWin": true,
+  "staticThreshold": 100,
+  "lowLim": {},
+  "uppLim": {},
+  "window": 10,
+  "useScaler": false,
+  "includeAr": false,
+  "trainSize": 80,
+  "shuffle": true,
+  "lineSeparator": ",",
+  "decimalSeparator": ".",
+  "removedIntervals": [],
+  "degree": 1,
+  "interactionOnly": false,
+  "nanTreatment": "drop",
+  "startDate": null,
+  "endDate": null,
+  "scalerName": "None",
+  "supportFilters": {}
+}