feat(bootstrap): Bun-workspace skeleton + typed config + vendored modules — T02

- Bun workspaces (packages/* + bootstrap); Pulumi nodejs runtime under
  packagemanager: bun (no npm fallback needed).
- bootstrap/config.ts: typed FoundationConfig per CONTRACT_001; loadConfig()
  fails closed, aggregating all missing+malformed keys in one error. Reads flat
  dotted keys; image digests excluded (they live in VERSIONS, D5).
- bootstrap/Pulumi.foundation.yaml: non-secret placeholders only (RFC-5737 vm.host,
  .invalid offsite); no encryptionsalt/secrets committed (D2). pulumi preview = 0
  resources under the passphrase provider via gitignored file:// state backend.
- Stage-1 vendoring: packages/pulumi-{docker,vault} as @olsitec/* (source-only,
  logic unchanged). vault's 5 type-only imports from modules/olsitec re-homed
  verbatim into pulumi-vault/olsitec-types.ts to keep the egg self-contained.

Realizes PLAN-002 §10 T02; ADR-005 / 000_TOPOLOGY.md §5 Stage-1.

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

bootstrap/index.ts

@@ -0,0 +1,37 @@
+// index.ts — the foundation egg entrypoint (PLAN-002 §0, Layer 0).
+//
+// T02 SCAFFOLD STATE: this entrypoint is intentionally a NO-OP beyond config
+// validation. It calls loadConfig() so that `pulumi preview` exercises the
+// CONTRACT_001 fail-closed validation (acceptance T02), but it creates NO real
+// resources yet. The data plane / Vault / RustFS / Postgres / Forgejo / Caddy /
+// runner components are LATER tasks (PLAN-002 §10: T03–T15) and are deliberately
+// NOT authored here.
+import * as pulumi from "@pulumi/pulumi";
+
+import { loadConfig, sshPrivateKeyPath } from "./config";
+
+// Fail closed here: if required config is missing/malformed, loadConfig throws
+// and `pulumi preview` reports the full gap (CONTRACT_001 §Validation).
+const config = loadConfig();
+
+// The vendored @olsitec/pulumi-docker provider (CONTRACT_003) will, in T03+, use
+// this key path + config.vm.{host,user} to reach the foundation VM over SSH.
+// Resolved here only to prove the ENV channel is wired; not yet consumed.
+const sshKeyPath = sshPrivateKeyPath();
+
+pulumi.log.info(
+  `foundation config loaded (no-op scaffold): ` +
+    `baseDomain=${config.baseDomain}, vm=${config.vm.user}@${config.vm.host}, ` +
+    `network=${config.network.name} (${config.network.subnet}), tls=${config.tls.mode}`,
+);
+
+// Stack outputs — safe, non-secret echoes so `pulumi preview`/`up` has something
+// to show while no resources exist. Replaced by real component outputs in T03+.
+export const phase = "T02-scaffold";
+export const baseDomain = config.baseDomain;
+export const networkName = config.network.name;
+export const vmTarget = pulumi.interpolate`${config.vm.user}@${config.vm.host}`;
+export const sshKeyConfigured = sshKeyPath.length > 0;
+export const enabledFeatures = Object.entries(config.features)
+  .filter(([, on]) => on)
+  .map(([name]) => name);