feat(mcp): ledger tools bridged into the CMS assistant /mcp + submodule bumps

The backoffice commerce build now merges the ledger service's full MCP
tool surface (/ledger-mcp) into /mcp via MountLedgerMCP — a JSON-RPC
bridge that forwards tools/call to the ledger service (single-writer
AOF preserved), gated by the shared MCP_API_KEY. Compose backoffice now
sets LEDGER_URL=http://ledger:8080.

Submodule bumps:
- backoffice: ledger MCP bridge + device approve-page sign-in gating
- slask-finder: safe returnTo after OIDC login + dep tidy
- go-cart-actor / go-image-gen / go-redirector / slask-tracking: dep updates

Infra: k8s order CHROME_CDP_URL pinned to the headless-shell ClusterIP
(DNS-rebinding guard) + shared invoice-issuer-config ConfigMap for the
invoice PDF seller block; platform go.mod refreshed (otel direct, x/sys).
docs/status.md notes the ledger tools on /mcp.

Generated with Codebuff 🤖
Co-Authored-By: Codebuff <noreply@codebuff.com>

go.sum

@@ -1,12 +1,16 @@
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-golang.org/x/sys v0.46.0 h1:noSf2Fq6F8DBgS+LysIkx7rIExoNHJsxOAtPp4rthXw=
-golang.org/x/sys v0.46.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
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