chore(repo): move v1/ → archive/v1/ + add archive/README.md (#430)

The Rust port at v2/ has been the primary codebase since the rename
in #427. The Python implementation at v1/ is no longer the active
target; the only load-bearing path is the deterministic proof bundle
at v1/data/proof/ (per ADR-011 / ADR-028 witness verification).

Move the whole Python tree into archive/v1/ and document the policy
in archive/README.md: no new features, bug fixes only when they affect
a still-load-bearing path (currently just the proof), CI continues to
verify the proof on every push and PR.

Path references updated in 26 files via path-pattern sed (only
matches v1/<known-child> patterns, never bare v1 or API URLs like
/api/v1/). Two double-prefix typos (archive/archive/v1/) caught and
hand-fixed in verify-pipeline.yml and ADR-011.

Validated:
- Python proof verify.py imports cleanly at archive/v1/data/proof/
  (numpy/scipy still required; CI installs requirements-lock.txt
  from archive/v1/ now)
- cargo test --workspace --no-default-features → 1,539 passed,
  0 failed, 8 ignored (unaffected by Python tree relocation)
- ESP32-S3 on COM7 untouched (no firmware paths changed)

After-merge: contributors should re-run any local `python v1/...`
commands as `python archive/v1/...` (CLAUDE.md and CHANGELOG already
updated).

CLAUDE.md

@@ -91,10 +91,10 @@ cargo test --workspace --no-default-features
 cargo check -p wifi-densepose-train --no-default-features
 
 # Python — deterministic proof verification (SHA-256)
-python v1/data/proof/verify.py
+python archive/v1/data/proof/verify.py
 
 # Python — test suite
-cd v1 && python -m pytest tests/ -x -q
+cd archive/v1 && python -m pytest tests/ -x -q
 ```
 
 ### ESP32 Firmware Build (Windows — Python subprocess required)
@@ -156,7 +156,7 @@ cargo test --workspace --no-default-features
 
 # 2. Python proof — must print VERDICT: PASS
 cd ..
-python v1/data/proof/verify.py
+python archive/v1/data/proof/verify.py
 
 # 3. Generate witness bundle (includes both above + firmware hashes)
 bash scripts/generate-witness-bundle.sh
@@ -169,8 +169,8 @@ bash VERIFY.sh
 **If the Python proof hash changes** (e.g., numpy/scipy version update):
 ```bash
 # Regenerate the expected hash, then verify it passes
-python v1/data/proof/verify.py --generate-hash
-python v1/data/proof/verify.py
+python archive/v1/data/proof/verify.py --generate-hash
+python archive/v1/data/proof/verify.py
 ```
 
 **Witness bundle contents** (`dist/witness-bundle-ADR028-<sha>.tar.gz`):
@@ -183,9 +183,9 @@ python v1/data/proof/verify.py
 - `VERIFY.sh` — One-command self-verification for recipients
 
 **Key proof artifacts:**
-- `v1/data/proof/verify.py` — Trust Kill Switch: feeds reference signal through production pipeline, hashes output
-- `v1/data/proof/expected_features.sha256` — Published expected hash
-- `v1/data/proof/sample_csi_data.json` — 1,000 synthetic CSI frames (seed=42)
+- `archive/v1/data/proof/verify.py` — Trust Kill Switch: feeds reference signal through production pipeline, hashes output
+- `archive/v1/data/proof/expected_features.sha256` — Published expected hash
+- `archive/v1/data/proof/sample_csi_data.json` — 1,000 synthetic CSI frames (seed=42)
 - `docs/WITNESS-LOG-028.md` — 11-step reproducible verification procedure
 - `docs/adr/ADR-028-esp32-capability-audit.md` — Complete audit record
 
@@ -216,8 +216,8 @@ Active feature branch: `ruvsense-full-implementation` (PR #77)
 - `v2/crates/wifi-densepose-ruvector/src/viewpoint/` — Cross-viewpoint fusion (5 files)
 - `v2/crates/wifi-densepose-hardware/src/esp32/` — ESP32 TDM protocol
 - `firmware/esp32-csi-node/main/` — ESP32 C firmware (channel hopping, NVS config, TDM)
-- `v1/src/` — Python source (core, hardware, services, api)
-- `v1/data/proof/` — Deterministic CSI proof bundles
+- `archive/v1/src/` — Python source (core, hardware, services, api)
+- `archive/v1/data/proof/` — Deterministic CSI proof bundles
 - `.claude-flow/` — Claude Flow coordination state (committed for team sharing)
 - `.claude/` — Claude Code settings, agents, memory (committed for team sharing)
 
@@ -243,7 +243,7 @@ Active feature branch: `ruvsense-full-implementation` (PR #77)
 Before merging any PR, verify each item applies and is addressed:
 
 1. **Rust tests pass** — `cargo test --workspace --no-default-features` (1,031+ passed, 0 failed)
-2. **Python proof passes** — `python v1/data/proof/verify.py` (VERDICT: PASS)
+2. **Python proof passes** — `python archive/v1/data/proof/verify.py` (VERDICT: PASS)
 3. **README.md** — Update platform tables, crate descriptions, hardware tables, feature summaries if scope changed
 4. **CLAUDE.md** — Update crate table, ADR list, module tables, version if scope changed
 5. **CHANGELOG.md** — Add entry under `[Unreleased]` with what was added/fixed/changed