Undenatured Type II Collagen: as an Oral Tolerance-Inducing Immuno-modulator Restoring Treg/Th17 Balance, Suppressing Pro-Inflammatory Cytokines and Matrix-Degrading Enzymes, Stabilizing Synovial Homeostasis, and Preserving Cartilage Integrity at a Clinically Validated 40 mg/day Dose 0009-0007-5798-1996 DOI: 10.5281/zenodo.16939373