chore(8.0): modernize toolchain + position Bun as a runtime

Consumer-invisible modernization pass — no public API or runtime-behavior
change; dist for the override-only files is byte-identical.

Toolchain:
- CI: GitHub Actions matrix — Node 22/24 (test:unit) + Bun latest (test:bun).
- engines: node ">=22" (was "22.x"), bun ">=1.1.0".
- tsconfig: isolatedModules + noImplicitOverride; add the 33 `override`
  modifiers the flag requires across storage/integrations/vfs/transaction.
- deps: @types/node ^22; add prettier; drop dead standard-version,
  @rollup/plugin-* and the redundant embedded eslintConfig (flat
  eslint.config.js is the active config — verified identical lint output).

paramValidation: replace the top-level `await import('node:os'/'node:fs')`
with static ESM imports. The top-level-await form poisoned the module graph;
static imports also drop the browser/edge fallback branches no supported
runtime reaches (8.0 is Node/Bun/Deno-only).

Bun positioning: recommend Bun as a runtime (`bun add` / `bun run`), which is
green (test:bun 8/8). Drop single-binary `bun build --compile` as a target —
native addons cannot embed into it, and Bun 1.3.10 has a `--compile` codegen
regression around top-level await. Rename the Bun test to bun-runtime-test.ts
and correct docs that overclaimed single-binary support.

Gates: typecheck 0, build 0, test:unit 1743/1743, test:bun 8/8.

package.json

@@ -66,8 +66,8 @@
     }
   },
   "engines": {
-    "node": "22.x",
-    "bun": ">=1.0.0"
+    "node": ">=22",
+    "bun": ">=1.1.0"
   },
   "scripts": {
     "clean": "node -e \"require('fs').rmSync('dist',{recursive:true,force:true})\"",
@@ -94,8 +94,7 @@
     "test:ci-unit": "CI=true vitest run --config tests/configs/vitest.unit.config.ts",
     "test:ci-integration": "NODE_OPTIONS='--max-old-space-size=16384' CI=true vitest run --config tests/configs/vitest.integration.config.ts",
     "test:ci": "npm run test:ci-unit && npm run test:ci-integration",
-    "test:bun": "bun tests/integration/bun-compile-test.ts",
-    "test:bun:compile": "bun build tests/integration/bun-compile-test.ts --compile --outfile /tmp/brainy-bun-test && /tmp/brainy-bun-test",
+    "test:bun": "bun tests/integration/bun-runtime-test.ts",
     "test:wasm": "npx vitest run tests/integration/wasm-embeddings.test.ts",
     "typecheck": "tsc --noEmit",
     "lint": "eslint --ext .ts,.js src/",
@@ -106,11 +105,7 @@
     "release:patch": "./scripts/release.sh patch",
     "release:minor": "./scripts/release.sh minor",
     "release:major": "./scripts/release.sh major",
-    "release:dry": "./scripts/release.sh patch --dry-run",
-    "release:standard-version": "standard-version",
-    "release:standard-version:patch": "standard-version --release-as patch",
-    "release:standard-version:minor": "standard-version --release-as minor",
-    "release:standard-version:major": "standard-version --release-as major"
+    "release:dry": "./scripts/release.sh patch --dry-run"
   },
   "keywords": [
     "ai-database",
@@ -157,14 +152,10 @@
     "boolean": "3.2.0"
   },
   "devDependencies": {
-    "@rollup/plugin-commonjs": "^28.0.6",
-    "@rollup/plugin-node-resolve": "^16.0.1",
-    "@rollup/plugin-replace": "^6.0.2",
-    "@rollup/plugin-terser": "^0.4.4",
     "@testcontainers/redis": "^11.5.1",
     "@types/js-yaml": "^4.0.9",
     "@types/mime": "^3.0.4",
-    "@types/node": "^20.11.30",
+    "@types/node": "^22",
     "@types/uuid": "^10.0.0",
     "@types/ws": "^8.18.1",
     "@typescript-eslint/eslint-plugin": "^8.0.0",
@@ -172,7 +163,7 @@
     "@vitest/coverage-v8": "^3.2.4",
     "jspdf": "^3.0.3",
     "minio": "^8.0.5",
-    "standard-version": "^9.5.0",
+    "prettier": "^3.9.4",
     "testcontainers": "^11.5.1",
     "tsx": "^4.19.2",
     "typescript": "^5.4.5",
@@ -210,33 +201,5 @@
     "tabWidth": 2,
     "trailingComma": "none",
     "useTabs": false
-  },
-  "eslintConfig": {
-    "root": true,
-    "extends": [
-      "eslint:recommended",
-      "plugin:@typescript-eslint/recommended"
-    ],
-    "parser": "@typescript-eslint/parser",
-    "plugins": [
-      "@typescript-eslint"
-    ],
-    "rules": {
-      "@typescript-eslint/no-explicit-any": "off",
-      "no-unused-vars": "off",
-      "@typescript-eslint/no-unused-vars": [
-        "warn",
-        {
-          "args": "after-used",
-          "argsIgnorePattern": "^_"
-        }
-      ],
-      "semi": "off",
-      "@typescript-eslint/semi": [
-        "error",
-        "never"
-      ],
-      "no-extra-semi": "off"
-    }
   }
 }