docs(W4): stamp kind and status front matter on 104 live documents

Applies the document contract from
docs/plans/2026-08-20_stack-docs-flatten-and-alignment.md section 3, partially:
`kind` and `status` only. `parent` is deliberately held until the flatten in
section 4 lands, so that 127 documents do not have to be re-pointed by hand
when docs/fleet/NORTH_STAR.yaml moves to docs/NORTH_STAR.yaml.

Scope, measured on origin/next at 63069149:

  127 live docs   = all *.md under docs/ minus docs/archive/ minus docs/_old_structure/
  104 stamped     here
   19 held        operator judgement (plan section 9), worklist in the same PR
    3 held        the SUPERSEDED TASKS.md stamps, which cite the moving path
    1 untouched   docs/fleet/FLEET-DOCTRINE.md, already stamped in W1

Kinds applied: 54 guide, 34 record, 9 spec, 6 tracking, 1 projection.
Every row carries a confidence and a one-line rationale in the worklist.

Two collisions with the existing state, both flagged rather than resolved:

1. docs/README.md:150-160 already documents a front-matter convention
   (title/type/audience/status/source_of_truth) with its own allowed values.
   It is applied to 4 of 127 files. Its `status` vocabulary is
   current|draft|deprecated|historical; the new contract's is active|superseded-by.
   The key collides. This commit lets the new contract win and rewrites
   `status: current` to `status: active` on those 4 files, keeping their other
   legacy keys untouched. No code reads any of them: `git grep source_of_truth`
   outside docs/ returns nothing. docs/README.md still prescribes the old
   convention and is an operator row, so it is not edited here.

2. Two of the plan's 20 operator rows are YAML files, not markdown
   (docs/fleet/examples/roster-v2.yaml, docs/openapi-tess.yaml), and the
   contract's front-matter form has no defined meaning for a .yaml document.
   That gap also applies to docs/fleet/NORTH_STAR.yaml, the source of truth
   itself. Raised in the worklist.

A third row from the plan, docs/fleet/north-star.md, no longer exists: W1
renamed it to docs/fleet/FLEET-DOCTRINE.md.

Verification: 104/104 parse with the expected kind and status in front matter;
the check was shown to reject a wrong kind before it was trusted. The diff
removes 4 lines total, all of them `status: current`.

docs/DEVELOPER-GUIDE/architecture/README.md

@@ -1,3 +1,8 @@
+---
+kind: guide
+status: active
+---
+
 # Architecture
 
 > **Status:** Partially migrated. The lease-broker security-contract pages below are current references; the remaining architecture pages are still being classified.

docs/DEVELOPER-GUIDE/architecture/channel-protocol.md

@@ -1,3 +1,8 @@
+---
+kind: guide
+status: active
+---
+
 # Channel protocol architecture
 
 > **Status:** Current shared type contract and Discord compatibility baseline. The shared gateway registry, Telegram parity, Matrix integration, identity-linking, and multi-surface multiplexing described below are draft or unimplemented.

docs/DEVELOPER-GUIDE/architecture/compaction-revocation.md

@@ -1,3 +1,8 @@
+---
+kind: guide
+status: active
+---
+
 # Compaction observer revocation and runtime generations
 
 > **Status:** Current contract reference.

docs/DEVELOPER-GUIDE/architecture/decisions/README.md

@@ -1,3 +1,8 @@
+---
+kind: guide
+status: active
+---
+
 # Architecture Decisions
 
 > **Status:** Current decision index. A decision describes an implemented and accepted boundary; draft proposals belong under `rfcs/` or `docs/plans/`.

docs/DEVELOPER-GUIDE/architecture/decisions/mos-runtime-portability-m1.md

@@ -1,3 +1,8 @@
+---
+kind: record
+status: active
+---
+
 # Mos Runtime Portability M1 — Logical Identity and Fencing
 
 > **Decision status:** Current implemented decision (M1).

docs/DEVELOPER-GUIDE/architecture/lease-broker-protocol.md

@@ -1,3 +1,8 @@
+---
+kind: guide
+status: active
+---
+
 # Authenticated external lease broker protocol
 
 > **Status:** Current contract reference.

docs/DEVELOPER-GUIDE/architecture/lease-broker-security.md

@@ -1,3 +1,8 @@
+---
+kind: guide
+status: active
+---
+
 # WI-1 lease broker security notes
 
 > **Status:** Current contract reference.

docs/DEVELOPER-GUIDE/architecture/mutator-class-gate.md

@@ -1,3 +1,8 @@
+---
+kind: guide
+status: active
+---
+
 # Whole mutator-class lease gate
 
 > **Status:** Current contract reference.

docs/DEVELOPER-GUIDE/architecture/rfcs/README.md

@@ -1,3 +1,8 @@
+---
+kind: guide
+status: active
+---
+
 # Architecture RFCs
 
 > **Status:** Current proposal index. RFCs are draft design material and have no operational or implementation authority until an approved decision and implementation evidence supersede them.

docs/DEVELOPER-GUIDE/architecture/rfcs/optional-ai-egress-gateways.md

@@ -1,3 +1,8 @@
+---
+kind: spec
+status: active
+---
+
 # RFC: Optional AI Egress Gateways
 
 > **Status:** Draft / proposed — not approved, not current, and not integrated.