chore(release): 3.9.3

[acidkill]

Summary

Release 3.9.3. Version bumped across all 16 version-bearing locations, with a CHANGELOG.md section covering everything since 3.9.2: the two remote-topology fixes found while deploying 3.9.2 against SurrealDB over wss.

PATCH rather than MINOR: one configurable-env knob (#231, closes the stopgap half of #229 — root-cause stays open there) and one schema-convergence fix (#232, closes #230); no new surface beyond the env var.

Why

Deploying 3.9.2 on the remote topology exposed both issues live: MCP tool calls dying at the hardcoded 30 s while the CLI succeeded, and the legacy SCHEMALESS change_log table rejecting the payload … FLEXIBLE define on every startup.

Contents

• feat(mcp): SURREAL_MEMORY_MCP_TOOL_TIMEOUT makes the tool-call budget configurable #231 — SURREAL_MEMORY_MCP_TOOL_TIMEOUT (seconds, 600 s clamp, warn-and-default, startup log). 19 new tests; config reference regenerated (54th env row).
• fix(storage): ensure_schema converges a legacy SCHEMALESS change_log table #232 — ensure_schema probes INFO FOR DB and runs ALTER TABLE change_log SCHEMAFULL before the field defines; fail-soft. 5 new tests.
• Mechanical: sync_refs --fix (test-count references → 7500+ after +24 tests).

Test plan

• python scripts/pre_ship.py — all 10 sections pass (16/16 at 3.9.3, CHANGELOG check, ruff, mypy, fast suite, docs gates).
• Both content PRs green on all 9 CI checks before merge.
• Post-publish: confirm artefacts on PyPI, npm (plugin + SDK), ClawHub, VS Code Marketplace — publish steps are failure-tolerant, a green job is not proof.

Verified by

@acidkill