refactor: converge electrochem runner helpers

[Pluze]

Summary:

• Route EIS GUI plot/summary paths through app-owned eis.view helpers and remove duplicate local runner helpers.
• Remove the dead CSC local compute helper copy so the runner has one csc.ops.computeCSC path.
• Add guardrails against +ui/runApp helper shadow copies and direct wearable family helper packages.
• Document UI tool private helper contracts and shrink private contract debt from 73 to 62 files.
• Record the future ECG Print app-owned package target without moving the runner.

Tests:

• git diff --check
• scripts/run_matlab_tests.sh testProject
• scripts/run_matlab_tests.sh checkStyle
• scripts/run_matlab_tests.sh testAppsElectrochem
• scripts/run_matlab_tests.sh testAppsElectrochemGui
• scripts/run_matlab_tests.sh test

Not changed:

• No public app launch commands changed.
• No +labkit public facade changes.
• No buildtool task changes.
• No DTA legacy bridge fields removed.
• DIC and wearable private runners were not migrated.

Manual GUI:

• Interactive GUI workflow feel and file-dialog workflows were not run; only automated noninteractive GUI structural checks were run.