Refactor handling of watcher producer-only dbt flags

cosmos/operators/_watcher/base.py

@@ -397,6 +397,15 @@ def store_dbt_resource_status_from_log(
     _log_dbt_msg(log_line)
 
 
+# dbt flags set by the producer that must not propagate into the consumer's
+# retry command. ``--select`` / ``--exclude`` are dropped because the consumer
+# targets a single model and re-applies its own selector; ``--log-format`` is
+# dropped because the consumer's retry is a user-facing dbt run and should
+# default to text. Each entry consumes the following token as its value (e.g.
+# ``--log-format json``).
+_PRODUCER_ONLY_FLAGS: tuple[str, ...] = ("--select", "--exclude", "--log-format")
+
+
 class BaseConsumerSensor(BaseSensorOperator):  # type: ignore[misc]
     template_fields: tuple[str, ...] = ("model_unique_id", "compiled_sql")  # type: ignore[operator]
     poke_retry_number: int = 0
@@ -446,14 +455,10 @@ def _resource_label(self) -> str:
 
     @staticmethod
     def _filter_flags(flags: list[str]) -> list[str]:
-        """Filters out dbt flags that should not propagate from the producer to the consumer's retry:
-
-        - ``--select`` / ``--exclude``: the consumer targets a single model and re-applies its own selector.
-        - ``--log-format``: the producer always sets ``--log-format json`` so it can parse dbt's structured
-          event stream; the consumer's retry is a user-facing dbt run and should default to text. Users who
-          want JSON on the retry can opt in via
-          ``operator_args={"dbt_cmd_flags": ["--log-format", "json"]}``, which is appended by ``build_cmd``
-          outside of this flag pipeline.
+        """Filter out dbt flags that should not propagate from the producer to the consumer's retry.
+
+        The set of stripped flags is defined by ``_PRODUCER_ONLY_FLAGS`` at module
+        scope; see that constant's docstring for the rationale per flag.
         """
         filtered = []
         skip_next = False
@@ -463,7 +468,7 @@ def _filter_flags(flags: list[str]) -> list[str]:
                     skip_next = False
                 else:
                     continue  # skip value of previous flag
-            if token in ("--select", "--exclude", "--log-format"):
+            if token in _PRODUCER_ONLY_FLAGS:
                 skip_next = True
                 continue
             filtered.append(token)