Replace HolographicTransport with Erasure Coding

[iberi22]

This refactor replaces the legacy, lossy "Holographic Transport" (based on angular transformations) with a robust, lossless Reed-Solomon erasure coding implementation.

Key changes:

1. Erasure Coding: Introduced ErasureEncoder in synapse-core, providing real redundancy for P2P data transport. By default, it uses 4 data shards and 2 parity shards, allowing for the loss of any 2 shards without data corruption.
2. Entity Updates: Added ChunkShard to synapse-core::entities to support structured shard management.
3. Codebase Cleanup: Removed HolographicTransport and HologramCodec adapters which were identified as problematic. Updated relevant mod.rs files and removed orphaned tests/benchmarks.
4. Infrastructure Fixes: Resolved an issue in SurrealTokenomicsRepository where UserProfile was missing fields (is_validator, total_contributions) in both the Rust struct initialization and the SurrealDB schema, which was causing integration test failures.
5. Environment Stability: Confirmed that tests pass using --no-default-features to bypass environment-specific issues with the vision feature (specifically v4l2-sys-mit build failures).

Fixes #794

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PR created automatically by Jules for task 9894423614064503683 started by @iberi22

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