v3.76.1 — auto-memory import/sync exit non-zero when the memory package is missing

Patch release.

• Fix (#4963, PR #4974): auto-memory-hook import and sync now exit 1 when @claude-flow/memory cannot be resolved. Before, they printed the "DISABLED" warning and exited 0, so a hook runner saw success although nothing was imported or synced. Applies to the packaged helper, the repo copy and the init generator fallback; the helpers manifest was re-signed.

Verified on the published packages: a fresh ruflo@3.76.1 install imports all four bundled packages (security, codex, mcp, plugin-agent-federation) from the CLI's own resolution, and in a project with no memory package import and sync both exit 1.

Known: on release PR #4976 the ruflo-console write-argv.spec.ts append test (and the smoke step that runs it) failed three times in CI and passed locally and on main. Nothing in this release touches the console; it's tracked separately.

Published: @claude-flow/cli, claude-flow, ruflo at 3.76.1 (latest), and the MCP registry entry io.github.ruvnet/ruflo@3.76.1. alpha/v3alpha are unchanged at 3.75.2.