Overview

Adds recursive control jump support between processes and routines.

The parser now maintains a call frame stack model that enables:

• Routine invocation from within processes
• Nested routine calls
• Deterministic frame restoration
• Process-level execution isolation

Implementation Details

• Introduced IPCRoutineCall as a structured program counter override signal.
• Extended TPCOverride to support routine invocation.
• Added callFrames stack to parser state (TProgramMapEntry).
• Implemented frame preservation and restoration logic in getNextElement.
• Added interpreter wrapper invokeRoutine.
• Added test coverage for:
  • Single routine call
  • Nested routine calls
  • Multi-process isolation
  • Stack trace validation

Design Model

Execution flow:

Process
└─ box-boolean
└─ invoke Routine A
└─ Routine A
└─ invoke Routine B
└─ Routine B
└─ return
└─ return
└─ continue process

The call frame stack ensures:

• Frames are preserved at invocation
• Return node is restored correctly
• No frame leakage between processes
• No override bleeding into subsequent instructions

Testing

• All existing tests pass
• New tests validate recursive invocation behavior
• TypeScript check clean

Related Issue

Closes #137