Debugger call stack line numbers now match the method editor

The debugger call stack shows full source-file line numbers even though Objo Studio displays and edits individual method bodies with member-relative line numbers. This makes a paused instruction shown on editor line 8 appear as a call-stack location such as line 36, sometimes beyond the number of lines visible in the method. Call-stack line numbers should match the corresponding method editor line while retaining the absolute source location internally for navigation and debugger operations.