gradle.toml keeps generic Gradle runtime chatter that is not build signal

The current TOML Gradle filter keeps generic Gradle runtime chatter that is not usually useful build signal.

MWE

tmp=$(mktemp -d)
mkdir -p "$tmp/home/Library/Application Support/rtk" "$tmp/proj"

cat > "$tmp/home/Library/Application Support/rtk/filters.toml" <<'EOF'
schema_version = 1
[filters.gradle]
description = "Compact Gradle build output — strip progress, keep tasks and errors"
match_command = "^(?:\\./)?gradlew?\\b"
strip_ansi = true
strip_lines_matching = [
  "^\\s*$",
  "^> Configuring project",
  "^> Resolving dependencies",
  "^> Transform ",
  "^Download(ing)?\\s+http",
  "^\\s*<-+>\\s*$",
  "^> Task :.*UP-TO-DATE$",
  "^> Task :.*NO-SOURCE$",
  "^> Task :.*FROM-CACHE$",
  "^Starting a Gradle Daemon",
  "^Daemon will be stopped",
]
truncate_lines_at = 150
max_lines = 50
on_empty = "gradle: ok"
EOF

HOME="$tmp/home" gradle -p "$tmp/proj" init --type basic --dsl kotlin --project-name mwe --use-defaults
cd "$tmp/proj"

HOME="$tmp/home" RTK_TOML_DEBUG=1 rtk ./gradlew help
# actual includes:
# Calculating task graph as no cached configuration is available for tasks: help
# Reusing configuration cache.
# Configuration cache entry stored/reused.

Expected Keep the task result and help text, but drop generic runtime lines such as:

• Calculating task graph ...
• Reusing configuration cache.
• Configuration cache entry stored/reused.

Debug

RTK_TOML_DEBUG=1 rtk ./gradlew help
RTK_TOML_DEBUG=1 rtk ./gradlew tasks

Local workaround Extend strip_lines_matching with patterns for generic cache/task-graph chatter.

Proposed fix in rtk

• Add inline tests for help / tasks output with configuration-cache lines.
• Strip generic non-build-signal runtime lines while preserving task output, warnings, and real errors.
• Use earlier Gradle filter intent as guidance: older Gradle work explicitly treated generic task-progress noise as removable, e.g. PR #374, PR #381, PR #709.

Context

• Current TOML filter came from PR #635.
• Related: #1177.