[Milestone 2] Add inline bytes writer support

### Task Description

**What needs to be done:**
- Allow flexibility on the writer side to take in a byte array and convert it to the proper blob structure if the field is marked as a blob type.

**Why this task is needed:**
- Improves the developer ergonomics

### Task Type

Code improvement/refactoring

### Related Issues

**Parent feature issue:** (if applicable )
**Related issues:**
NOTE: Use `Relationships` button to add parent/blocking issues after issue is created.

Start by locating the writer path that handles fields marked as blob types and its existing tests. Verify how byte arrays should become the proper blob structure, add coverage for inline byte-array input, and confirm the writer tests pass.

Written by the indexing model from the issue text.