Move operator notes out of repo, add generic architecture doc

memory/infrastructure.md and memory/build_log.md held environment-
specific details — hostnames, IPs, account names, credentials
retrieval commands, local kubeconfig paths, operational status
notes. These don't belong in a project repo; by convention they
live in private operator notes.

Moved to ~/shorashim-operator-notes/ (private, outside git).

In their place, added deploy/ARCHITECTURE.md — a generic
description of the deployment shape: components, external
dependencies, configuration surface. No hostnames. No IPs.
No account names. Any competent operator can read it and
know how to deploy shorashim to their own infrastructure.

Updated cross-references in AGENTS.md and BUILD_KORBAN.md to
point to "the operator's private notes" instead of memory/.

Project repo is spec + implementation + deployment shape.
Operator notes are the kohen's personal log.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

AGENTS.md

@@ -60,7 +60,8 @@ before writing code. Do not summarize from memory. Read fresh.
 ## Broken Tablets (Build Log)
 
 Record what broke and how it was fixed. The correction is as important
-as the specification. See `memory/build_log.md` for the full log.
+as the specification. The full log is kept in the operator's private
+notes, outside this repo.
 
 Key corrections from L1 build:
 - U+05BD (siluq/meteg) misclassified as vowel — moved to TEAMIM_MAP