Summary

This PR adds a postinstall script that automatically installs npm dependencies for all bundled extensions that have their own package.json with dependencies (e.g., memory-lancedb, diagnostics-otel, feishu, matrix, etc.).

Problem

Without this fix, extensions with dependencies are broken out of the box because their node_modules are not installed during 'npm install -g openclaw'. This was reported in issue openclaw#28792.

Solution

Add a postinstall script that:

1. Scans all extensions in the extensions/ directory
2. Checks if each extension has a package.json with dependencies
3. Runs npm install --omit=dev --ignore-scripts for those extensions

Files Changed

• package.json: Added postinstall script
• scripts/install-extensions-deps.js: New script to install extension dependencies

Testing

Extensions with dependencies that will benefit from this fix:

• memory-lancedb (3 dependencies) - the main issue reported in memory-lancedb plugin dependencies not installed on install/update openclaw/openclaw#28792
• diagnostics-otel (11 dependencies)
• feishu (3 dependencies)
• matrix (5 dependencies)
• And 10 more...

Closes openclaw#28792