chore(root): complete Phase 2 — move TOPOLOGY.md, archive MAINTAINERS.md

Completes the deferred Phase 2 items + their reference updates:
- git mv TOPOLOGY.md  -> docs/TOPOLOGY.md
- git mv MAINTAINERS.md -> archive/ (real-but-divergent dup; keeper = MAINTAINERS.adoc)
- docs/THREAT-MODEL.md: link ../TOPOLOGY.md -> TOPOLOGY.md
- GOVERNANCE.md (x3) + CONTRIBUTING.md: MAINTAINERS.md -> MAINTAINERS.adoc
- .github/pull_request_template.md: TOPOLOGY.md -> docs/TOPOLOGY.md (checklist label)

Committed with --no-verify (owner-approved, one-time). The reference fixes touch
GOVERNANCE.md / CONTRIBUTING.md / docs/THREAT-MODEL.md, which the strict pre-commit
hook rejects for a PRE-EXISTING reason: they lack the literal owner-string (and
CONTRIBUTING.md has no SPDX header). Supplying those is a licence/attribution edit
reserved to the owner (hard-stop), so the hook could not be satisfied without an
owner-only change. No licence/SPDX content modified here — only path references.
The three files' missing owner-string/SPDX is logged as Phase 3/4 debt.

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

Author: hyperpolymath

.github/pull_request_template.md

@@ -30,7 +30,7 @@
 - [ ] `.machine_readable/ECOSYSTEM.a2ml` updated (if integrations changed)
 - [ ] `.machine_readable/META.a2ml` updated (if architectural decisions changed)
 - [ ] Documentation updated for user-facing changes
-- [ ] `TOPOLOGY.md` updated (if architecture changed)
+- [ ] `docs/TOPOLOGY.md` updated (if architecture changed)
 - [ ] `CHANGELOG` or release notes updated
 - [ ] New dependencies reviewed for license compatibility (MPL-2.0 / MPL-2.0)
 - [ ] ABI/FFI changes validated (`src/abi/` and `ffi/zig/` consistent)

CONTRIBUTING.md

@@ -42,7 +42,7 @@ typell/
 ├── CONTRIBUTING.md      # This file
 ├── GOVERNANCE.md
 ├── LICENSE
-├── MAINTAINERS.md
+├── MAINTAINERS.adoc
 ├── README.adoc
 ├── SECURITY.md
 ├── flake.nix            # Nix flake — fallback (Perimeter 1)

GOVERNANCE.md

@@ -63,7 +63,7 @@ release schedules, contributor access, and community standards.
 - Reviews and merges pull requests.
 - Triages issues and manages releases.
 - Upholds code quality, security standards, and the Code of Conduct.
-- Listed in [MAINTAINERS.md](MAINTAINERS.md).
+- Listed in [MAINTAINERS.adoc](MAINTAINERS.adoc).
 
 ### Contributor
 
@@ -103,7 +103,7 @@ A contributor may be nominated to become a maintainer when they demonstrate:
 2. The BDFL reviews the candidate's contribution history and community interactions.
 3. The BDFL approves or declines the nomination, with reasoning provided to the
    nominator.
-4. If approved, the new maintainer is added to [MAINTAINERS.md](MAINTAINERS.md) and
+4. If approved, the new maintainer is added to [MAINTAINERS.adoc](MAINTAINERS.adoc) and
    granted appropriate repository access.
 
 ---
@@ -123,7 +123,7 @@ A maintainer may be removed under the following circumstances:
   documented privately.
 
 Removed maintainers are moved to the Emeritus section of
-[MAINTAINERS.md](MAINTAINERS.md) unless removal was due to a serious Code of Conduct
+[MAINTAINERS.adoc](MAINTAINERS.adoc) unless removal was due to a serious Code of Conduct
 violation.
 
 ---

MAINTAINERS.md archive/MAINTAINERS.mdMAINTAINERS.md renamed to archive/MAINTAINERS.md

@@ -35,7 +35,7 @@
 
 Brief description of Typell and its architecture.
 
-> See [TOPOLOGY.md](../TOPOLOGY.md) for the full architecture diagram and completion dashboard.
+> See [TOPOLOGY.md](TOPOLOGY.md) for the full architecture diagram and completion dashboard.
 
 ## Assets