5545f144: expose exact DSL lambda at top-level; preserve behavior with typed helpers

[cristianoc]

Title: 5545f144: expose exact DSL lambda at top-level; preserve behavior with typed helpers

Summary

• Replace solver body with the exact DSL lambda from abstractions.md at top level.
• Implement DSL-named helpers to preserve original behavior; add minimal types for clarity.

Changes (single file)

• tasks/5545f144/solution.py
  • Expose exact lambda:
    def solve_5545f144(grid: Grid) -> Grid:
    segments = extractSegmentsPerRow(grid)
    consensus = findConsensusColumns(segments)
    aligned = [alignFirstSegment(row) for row in segments]
    return propagateConsensus(grid, consensus, aligned)
  • Implement helpers: extractSegmentsPerRow, findConsensusColumns, alignFirstSegment, propagateConsensus.
  • Add types (Grid, Column) and a SegmentRow dataclass; keep alias p = solve_5545f144.

Equivalence

• Logic mirrors the original implementation (segment detection, highlight selection, two‑segment special case, consensus/align/backfill).
• Output shape and fill semantics unchanged.

Validation

• Import succeeds and function signature matches abstraction note.
• Spot-check on training grids produces identical outputs.

Compatibility

• Backward alias p = solve_5545f144 retained.