harness: read Syncro keys from vault, stop hardcoding the repo root

Two defects found while running /wiki-compile, both from tooling assuming
a path instead of resolving it.

1. Plaintext Syncro API keys. Mike's and Howard's live PSA keys were
   copy-pasted into three command files, a script, and two catalog docs --
   despite both already being vaulted at msp-tools/syncro and
   msp-tools/syncro-howard. Replaced with reads from the SOPS vault via a
   new sourced helper, .claude/scripts/syncro-env.sh. Write paths fail
   closed; read-only paths degrade to skipped enrichment rather than a
   wrong key. Per-user mapping is unchanged, so Syncro attribution is too.

2. Hardcoded repo root. wiki-compile/wiki-lint/inject-standards and
   gen_b64.py hardcoded D:/claudetools; this machine is C:/claudetools.
   syncro.md also read ~/.claude/identity.json before the repo copy -- the
   same bug that made remediation-tool's consent-audit report a fully
   consented tenant as RED. Root now resolves from the script's own
   location, with identity.json claudetools_root as the override.

get-identity.sh had a chicken-and-egg bug: it read ${CLAUDETOOLS_ROOT:-.}
but never set it, so every caller had to already know the root. It now
self-resolves and exports CLAUDETOOLS_ROOT + VAULT_ROOT.

Verified: all three command setup blocks authenticate against live Syncro;
get-identity.sh works from any cwd and honors a pre-set root; gps-rmm
autoenroll resolves its key from the vault. security-review: no findings.

NOTE: both keys remain valid in git history. Rotation in the Syncro portal
is the required follow-up -- this commit does not resolve that exposure.

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

.claude/scripts/syncro-env.sh

@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+# syncro-env.sh — Resolve the repo root and the caller's Syncro API key from the SOPS vault.
+#
+# Source this instead of hardcoding a repo path or an API key:
+#   source "$(dirname "${BASH_SOURCE[0]}")/syncro-env.sh"     # or by absolute path
+#   curl -s "$SYNCRO_BASE/customers?api_key=$SYNCRO_API_KEY"
+#
+# Exports: CLAUDETOOLS_ROOT, VAULT_ROOT, SYNCRO_USER, SYNCRO_BASE, SYNCRO_API_KEY
+#
+# Root resolution mirrors vault.sh: derive from this script's own location, then let
+# identity.json's claudetools_root override. Never hardcode a drive letter — the repo
+# lives at C:/claudetools on some machines and D:/claudetools on others.
+#
+# Soft-fails like get-identity.sh: on any failure it warns, leaves SYNCRO_API_KEY empty,
+# and returns 1 without exiting, so a sourcing skill degrades instead of dying.
+
+_syncro_env_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+export CLAUDETOOLS_ROOT="$(cd "$_syncro_env_dir/../.." && pwd)"
+_identity="$CLAUDETOOLS_ROOT/.claude/identity.json"
+
+export SYNCRO_BASE="https://computerguru.syncromsp.com/api/v1"
+export SYNCRO_API_KEY=""
+export SYNCRO_USER=""
+export VAULT_ROOT=""
+
+if [ ! -f "$_identity" ]; then
+    echo "[WARNING] identity.json not found at $_identity — Syncro calls will be unauthenticated" >&2
+    return 1 2>/dev/null || exit 1
+fi
+
+# identity.json is authoritative for both the repo root and the vault location.
+_root_override=$(jq -r '.claudetools_root // empty' "$_identity" 2>/dev/null)
+[ -n "$_root_override" ] && [ -d "$_root_override" ] && export CLAUDETOOLS_ROOT="$_root_override"
+export VAULT_ROOT=$(jq -r '.vault_path // empty' "$_identity" 2>/dev/null)
+export SYNCRO_USER=$(jq -r '.user // empty' "$_identity" 2>/dev/null)
+
+# Per-user token — attribution in Syncro depends on using the right one.
+case "$SYNCRO_USER" in
+    mike)   _vault_path="msp-tools/syncro" ;;
+    howard) _vault_path="msp-tools/syncro-howard" ;;
+    *)      echo "[WARNING] No Syncro key vaulted for user '$SYNCRO_USER' — enrichment skipped" >&2
+            return 1 2>/dev/null || exit 1 ;;
+esac
+
+SYNCRO_API_KEY=$(bash "$CLAUDETOOLS_ROOT/.claude/scripts/vault.sh" \
+    get-field "$_vault_path" credentials.credential 2>/dev/null | tail -1)
+export SYNCRO_API_KEY
+
+if [ -z "$SYNCRO_API_KEY" ]; then
+    echo "[ERROR] Could not read $_vault_path from vault — is SOPS/age configured?" >&2
+    bash "$CLAUDETOOLS_ROOT/.claude/scripts/log-skill-error.sh" "syncro-env" \
+        "vault read failed for $_vault_path" --context "user=$SYNCRO_USER" >/dev/null 2>&1 || true
+    return 1 2>/dev/null || exit 1
+fi
+
+unset _syncro_env_dir _identity _root_override _vault_path
+return 0 2>/dev/null || true