chore: auto-sync drop-in plugin example with source module

[byapparov]

Context

`examples/team-config/.opencode/plugins/hush.ts` is a verbatim copy of `src/plugins/sensitive-patterns.ts` + `src/plugins/opencode-hush.ts` inlined into one file. Security fixes to the source must also be manually applied to the example — there's no automated check for drift.

Proposal

Either:

1. Add a unit test that imports both and asserts the pattern lists are identical
2. Generate the drop-in example via a build step that inlines the source modules

Priority

Low — maintenance hazard, no runtime impact.