chore: release 0.17.0

[ajianaz]

What

Release prep for 0.17.0 — version bump across the workspace (0.16.0 → 0.17.0), internal dep requirements updated, CHANGELOG dated, and the dual-engine vector docs completed ([vector] backend section in configuration.md).

No code changes in this PR — all features below are already merged and individually CI-green on develop.

Why

Cut the 0.17.0 minor release per #1165 (vecq-core 0.3 already pinned on develop and validated against crates.io).

Contents of 0.17.0 (all merged to develop)

Added

• Explain recall (Explain Recall Results #1160, feat: explain recall — ranking signals on CLI, HTTP, and MCP (#1160) #1186) — --explain / explain: true / MCP explain on every recall surface; per-result ranking signals (vector sim + rank, FTS rank, RRF contributions, boost deltas)
• Contradiction resolution ledger + undo (Memory evolution ideas (external feedback): provenance events, per-agent room scopes, contradiction resolution #1172 F2, feat: contradiction resolution ledger + undo across CLI/HTTP/MCP (#1172) #1185) — edge-driven ledger, atomic undo, GET /contradictions, POST /contradictions/undo, CLI contradictions list|undo, MCP tools
• Contradiction benchmark segment (Memory evolution ideas (external feedback): provenance events, per-agent room scopes, contradiction resolution #1172 F3, feat: contradiction benchmark segment + uteke supersede CLI (#1172 F3) #1192) — contradiction_segment.py + published RESULTS.md section; fusion winner@1 0.850 → 1.000, stale@5 1.000 → 0.000 after supersede
• uteke supersede CLI (feat: contradiction benchmark segment + uteke supersede CLI (#1172 F3) #1192) — surface parity (was MCP/HTTP only)
• /list pagination metadata (server: /list pagination metadata (total / has_more / next_offset) - clients blind-paginate #1188, feat: /list pagination metadata envelope (#1188) #1191) — opt-in include_meta envelope
• Provenance data model (Memory evolution ideas (external feedback): provenance events, per-agent room scopes, contradiction resolution #1172 F1, feat(core): provenance data model — source hash, event actor/evidence chain (#1172) #1184) — schema v18, source_hash, actor/evidence chain, GET /provenance, CLI + MCP tools

Fixed

• Graph excludes stale memory nodes; readable node labels (graph: namespace=null returns stale nodes (deprecated memories, orphaned links) #1189 graph: memory nodes labeled with raw memory UUID - store readable content preview #1187, fix: graph excludes stale memory nodes + readable node labels (#1189 #1187) #1190)
• No-namespace ledger query bind bug (caught by new roundtrip test, feat: contradiction resolution ledger + undo across CLI/HTTP/MCP (#1172) #1185)

Dual-engine vector (validation this release)

UTEKE_VECTOR_BACKEND=usearch|vecq env or [vector] backend in uteke.toml switches engines at runtime with automatic index rebuild from SQLite (#1168). Validated for 0.17.0: vecq-core 0.3.0 = main (crates.io), merge gate green (59 tests dbg+release, fmt, clippy -D warnings, real benchmark r@1 0.940 / r@10 0.974 / 4.78x = BENCHMARK.md baseline), uteke vecq feature builds + E2E store→index→recall green on both engines.

Testing

• cargo test --workspace — 667 passed, 0 failed (release-commit build)
• fmt clean, clippy 0 warnings
• cora review pass (pre-commit + CI)
• QA sandbox (isolated UTEKE_HOME): 0.17.0 binary smoke on both engines — seed → recall (usearch), env-switch to vecq → recall, config-file switch → recall, explain output, empty ledger
• Production store backed up pre-release (integrity ok)

[github-actions]

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