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v0.7.4

Release v0.7.4: Universal FFI example and updated documentation
@nshkrdotcom nshkrdotcom tagged this 30 Dec 22:53 
Add comprehensive universal_ffi_example showcasing all Universal FFI
features introduced in recent versions. This serves as the canonical
reference for calling Python dynamically without code generation.

New example demonstrates:
  - SnakeBridge.call/4 for calling any Python function
  - SnakeBridge.get/3 for module attributes
  - SnakeBridge.method/4 and attr/3 for ref operations
  - SnakeBridge.bytes/1 for explicit binary encoding
  - Non-string key maps with integer and tuple keys
  - Auto-session management and process isolation
  - Bang variants for raising on error
  - Streaming patterns with iterators

Updated existing examples:
  - dynamic_dispatch_example: Side-by-side comparison of original
    Runtime.call_dynamic API vs new SnakeBridge.call convenience API
  - types_showcase: Added sections for SnakeBridge.Bytes and non-string
    key map serialization with tagged dict wire format
  - session_lifecycle_example: Added auto-session demonstrations
    including creation, release, recreation, and process isolation

Documentation updates:
  - README.md version references updated to 0.7.4
  - examples/README.md updated with universal_ffi_example entry
  - CHANGELOG.md version header corrected
  - Added universal_ffi_example to run_all.sh test suite

All example lock files and registry.json files regenerated with
updated generator hash reflecting 0.7.3 base version.
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