v0.22.5

What's Changed

• ci: add cargo-hack feature isolation and default-build check jobs by @bug-ops in #6744
• ci: pin fuzz jobs to gnu target to fix musl/sanitizer conflict by @bug-ops in #6745
• refactor: remove redundant feature gates, promote index into full by @bug-ops in #6747
• build: raise MSRV to Rust 1.98 and resolve new clippy lints by @bug-ops in #6748
• ci: pin lint-fmt nightly toolchain and skip redundant archive compression by @bug-ops in #6751
• docs(specs): extend ARCHITECTURE.md dependency graph to specs 035-085 by @bug-ops in #6752
• fix(skills): resolve broken intra-doc links to Qdrant variant by @bug-ops in #6753
• fix(gateway): gate /metrics endpoint behind optional auth and rate limiting by @bug-ops in #6756
• fix(a2a): reword broken intra-doc links to feature-gated sign_card by @bug-ops in #6757
• ci(rustdoc): build zeph-skills docs with default (non-qdrant) features by @bug-ops in #6758
• refactor(config): use explicit re-exports in memory and migrate modules by @bug-ops in #6759
• refactor(vault): add SecretFuture alias to de-duplicate get_secret return type by @bug-ops in #6760
• spec(skill-execution-state): add specification for SKILL.state bounded execution state by @bug-ops in #6761
• fix(core): bound ambient shared-state prompt read at a fixed row count by @bug-ops in #6767
• fix(subagent): repair tool pairing and bound context injection by @bug-ops in #6769
• feat(subagent): add live peer-to-peer messaging between subagents by @bug-ops in #6776
• fix(memory): order ambient shared-state read newest-first to close truncation-starvation by @bug-ops in #6772
• fix(llm): break router opaque-type recursion overflowing fuzz build by @bug-ops in #6777
• fix(memory): write provenance, row-cap eviction, and NDJSON rendering for cross-thread store by @bug-ops in #6779
• refactor(llm): consolidate ToolUse/ToolResult orphan-pairing repair into a shared helper by @bug-ops in #6780
• fix(llm,core): close orphaned tool-pairing gaps in OpenAI builder and shutdown tombstone flush by @bug-ops in #6785
• fix(core): reset BudgetHint remaining_tool_calls per turn instead of stale carry-over by @bug-ops in #6787
• release: v0.22.5 by @bug-ops in #6788

Full Changelog: v0.22.4...v0.22.5