feat: support import.meta.hot.data for persistent objects across hmr updates

[NathanWalker]

Improve the stability and correctness of Hot Module Replacement (HMR) and HTTP module loading.

HMR key normalization and stability

• Introduced a new canonicalization routine for HMR keys in InitializeImportMetaHot, ensuring that per-module hot.data persists across HMR updates by stripping fragments, normalizing dev endpoint paths
• Updated all HMR callback and data property registrations to use the canonicalized key, preventing issues where module updates would not propagate due to key mismatches