Consolidate credential/env sprawl into ~/vr1-office1-creds/ (SEC-009); seed memory ...

Operator-approved. Three env files were loose in ~ outside the consolidated creds
folder -- .vr1-netbox.env, vr1-office1.env, and vr1-stage1.env. The last was mode
0664 (world-readable) and held TF_VAR_maas_api_key: a real MAAS-secret exposure,
not just untidiness. None created this session (mtimes 07-10..12).

Done (files outside the repo; recorded in the changelog):
- moved all three into ~/vr1-office1-creds/; chmod 600 on every sensitive file
  (fixed the two 0664 files: vr1-stage1.env and tailscale-authkey.txt).
- no CONTENTS read -- key NAMES only, to identify each file's purpose.
- fixed a D-119 follow-up the in-repo sweep could not reach: vr1-stage1.env had
  TF_VAR_dc1_pool_path/dc2 -> renamed to TF_VAR_vr1_dc0/vr1_dc1_pool_path.

Repo (committed):
- active path refs old ~/.vr1-netbox.env -> ~/vr1-office1-creds/vr1-netbox.env in
  prod-draft-dump.py, the phase1 runbook Step 10b, as-built, and the ledger. Dated
  changelog/incident records left as historical snapshots.
- as-built secrets table: the three env files + the convention. CORRECTED a
  mid-session wrong assumption -- the SANDBOX token is NOT on vcloud; it is on
  office1-netbox (/root/netbox-secrets/). vr1-netbox.env is the UPSTREAM token only.
- security-ledger SEC-009 (REMEDIATED) + the standing per-site consolidation convention.
- seeded agent memory (was EMPTY): the creds convention + the closed-test posture,
  so neither is re-lost at compaction.

STANDING CONVENTION: per-site ~/<site>-creds/ (0700; files 0600); no loose env in ~;
~/vr1-dc0-creds/ and ~/vr1-dc1-creds/ follow the pattern from day one. Data-loss /
continuity control first; real cred hardening deferred to post-teardown (closed test).

GAUNTLET ALL GREEN (58). repo-lint 0 fail.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>