v0.3.0 - Ring Isolation, Hardened memfd Lifecycle & 15-Suite Test Harness

What's Changed in v0.3.0

Comprehensive 15-Suite Integration Test Harness

• Restructured test framework into 15 specialized integration test binaries covering durability, scoped rings, memory hygiene, concurrency, fuzz boundaries, headless clones, large files, and submodules.

Scoped Ring Isolation & Multi-Worktree Durability

• Hardened ring state isolation across concurrent repository operations and Git worktrees with atomic ring lock scoping.

Hardened memfd Lifecycle & Process Snooping Defenses

• Enforced Linux process dumpability restrictions (PR_SET_DUMPABLE=0) on child processes spawned during secret injection to defeat /proc snooping and ptrace inspection.

Fail-Closed Atomic Recovery

• Enhanced write-ahead logging (WAL) and rollback mechanics during interrupted rekey operations.

Full Changelog: v0.2.0...v0.3.0