fix(deps): downgrade write-file-atomic 8.0.0→7.0.1 to match supported node range (#155)

## Summary

`write-file-atomic@8.0.0` declares `engines: { node: "^22.22.2 ||
^24.15.0 || >=26.0.0" }` — which **excludes node 20 entirely, and node
22.0–22.22.1**. That contradicts this repo's own supported-node matrix
and produces `EBADENGINE` on `npm install -g @opencodehub/cli@latest`
(reported on node 22.22.0), plus a hard failure on the node-20 leg of
Verify Global Install (we set `engineStrict: true`).

| | node range |
|---|---|
| Repo `engines` (root) | `>=22.0.0` |
| `cli` `engines` | `>=20.0.0` |
| Verify Global Install matrix | node **20** / 22 / 24 |
| `write-file-atomic@8.0.0` requires | `^22.22.2 \|\| ^24.15.0 \|\|
>=26.0.0` ❌ |
| `write-file-atomic@7.0.1` requires | `^20.17.0 \|\| >=22.9.0` ✅ covers
the whole matrix |

## Changes

Pin `write-file-atomic` `8.0.0 → 7.0.1` in the 4 packages that depend on
it: **`cli`, `analysis`, `ingestion`, `wiki`**. Lockfile regenerated —
26 lines, only write-file-atomic (4 importer specifiers + package def +
snapshot + time entry), same single transitive (`signal-exit@4.1.0`), no
unrelated churn.

## Why this is safe

- `write-file-atomic@8.0.0` arrived via a **Dependabot consolidation**
(#91), not a deliberate security bump. The package has **no advisories**
(clean on osv).
- Our API usage — `wfa(path, content)` and `wfa(path, content, { raw:
true })` — is unchanged since v4. `@types/write-file-atomic@4.0.3`
(already a devDep) still applies; left untouched.

## Verification

- `pnpm --filter @opencodehub/analysis --filter @opencodehub/cli build`
(tsc -b) — clean
- `pnpm --filter @opencodehub/analysis test` — 143/143
- Full recursive pre-push gate (`pnpm -r test` + typecheck + verdict) —
green

## Test plan
- [x] Lockfile resolves write-file-atomic@7.0.1 with engines covering
node 20/22/24
- [x] Direct consumers (cli, analysis) typecheck + build
- [x] Recursive test suite green

Author: theagenticguy

packages/analysis/package.json

@@ -42,7 +42,7 @@
     "@opencodehub/sarif": "workspace:*",
     "@opencodehub/storage": "workspace:*",
     "@opencodehub/wiki": "workspace:*",
-    "write-file-atomic": "8.0.0"
+    "write-file-atomic": "7.0.1"
   },
   "devDependencies": {
     "@types/node": "25.9.1",

packages/cli/package.json

@@ -53,7 +53,7 @@
     "commander": "14.0.3",
     "envinfo": "7.21.0",
     "listr2": "10.2.1",
-    "write-file-atomic": "8.0.0",
+    "write-file-atomic": "7.0.1",
     "yaml": "2.9.0"
   },
   "devDependencies": {

packages/ingestion/package.json

@@ -58,7 +58,7 @@
     "snyk-nodejs-lockfile-parser": "2.7.1",
     "spdx-correct": "^3.2.0",
     "web-tree-sitter": "0.26.9",
-    "write-file-atomic": "8.0.0"
+    "write-file-atomic": "7.0.1"
   },
   "devDependencies": {
     "@types/node": "25.9.1",

packages/wiki/package.json

@@ -41,7 +41,7 @@
     "@opencodehub/core-types": "workspace:*",
     "@opencodehub/storage": "workspace:*",
     "@opencodehub/summarizer": "workspace:*",
-    "write-file-atomic": "8.0.0"
+    "write-file-atomic": "7.0.1"
   },
   "devDependencies": {
     "@types/node": "25.9.1",