fix(extension): accept links filter and offset params

[dimdasci]

Summary

• Fix extension forwarded-request validation for links so hrefContains and offset are accepted on the daemon→extension boundary.
• Validate offset as a non-negative integer at the extension boundary.
• Add regression coverage for accepted hrefContains/offset params and negative offset rejection.
• Bump package/runtime version to 0.9.3.

Validation

• pnpm check
• pnpm test
• pnpm --filter @bproxy/extension build
• Manual smoke: bproxy links -n k8m2p5 -s duihdh --limit 5 --offset 5 returned ok: true; --href-contains reddit.com returned ok: true.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud