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.

src/utils/paramValidation.ts

@@ -10,15 +10,13 @@ import { NounType, VerbType } from '../types/graphTypes.js'
 import { prodLog } from './logger.js'
 import { findCallerLocation } from './callerLocation.js'
 
-// Dynamic import for Node.js os and fs modules
-let os: any = null
-let fs: any = null
-try {
-  os = await import('node:os')
-  fs = await import('node:fs')
-} catch (e) {
-  // OS/FS modules not available
-}
+// 8.0 is Node/Bun/Deno-only (no browser path), so `node:os` / `node:fs` are
+// always present — static ESM imports instead of a top-level `await import()`.
+// The TLA form poisoned the module graph with a top-level await, which `bun
+// build --compile` refuses; the static form also drops the browser/edge
+// fallback branches that no supported runtime can reach.
+import * as os from 'node:os'
+import * as fs from 'node:fs'
 
 const getSystemMemory = (): number => {
   if (os) {