feat(notfiles): hexagonal architecture refactor with adapters, integration tests, and notsecrets cleanup

- Extract FileStore port and InMemoryFileStore/FileStoreImpl/Reporter adapters
- Add Reporter trait to notcore with TerminalReporter and JsonReporter
- Refactor linker, package, status modules to use FileStore port
- Add integration test suite with dotfiles fixtures
- Add cross-crate integration tests
- Remove ssh_rsa identity/recipient (unsupported)
- Add rustqual.toml, .sccignore, notfiles.toml config files
- Update CLAUDE.md, README.md, AGENTS.md with current architecture

.codex/hooks.json

@@ -0,0 +1,25 @@
+{
+  "hooks": {
+    "PostToolUse": [
+      {
+        "matcher": "Edit|Write",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "bash -c 'if [ -f Cargo.toml ]; then cargo check --quiet 2>&1 | head -20; fi'"
+          }
+        ]
+      }
+    ],
+    "SessionStart": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "nu /Users/joe/dev/notfiles/scripts/preflight.nu"
+          }
+        ]
+      }
+    ]
+  }
+}