chore(clients): bump humain-vc and reach-edu submodule pointers

Advances both client submodules to their current tips so the parent repo
references the corpus work already committed inside them.

reach-edu brings the inbox drain (141 → 4 pending across six triage batches),
the funder-folder reconciliation that made DB slugs source of truth on disk,
the carnegie corporation-into-foundation merge and the schusterman dupe merge,
the upmobility/urban-institute untangle, and the canonical-layer snapshots
published to the hub. It also declares the org binding org_id reach.edu.

humain-vc advances to its workspace org binding, org_id humain.vc.

Pointer-only commit — all content changes live in the submodules' own history.

Claude-Session: https://claude.ai/code/session_019a8tSPbFdvF1pKtADnWyDg

Author: mpstaton