Fix node:sqlite V8 crash on invalid UTF-8 in text columns (#272)

node:sqlite calls v8::String::NewFromUtf8 with kAbort on TEXT columns.
Cursor chat blobs often contain truncated multi-byte chars from streaming
boundaries, which triggers a V8 CHECK abort (not a JS exception).

Select all text-content columns as CAST(col AS BLOB) so node:sqlite
returns Uint8Array instead. Decode in JS with TextDecoder fatal:false
which replaces bad bytes with U+FFFD. Covers all three SQLite providers
(Cursor, Goose, OpenCode).

Removes the version blocklist (MIN_NODE_22_PATCH) and lowers engines
requirement from >=22.20 to >=22 since the BLOB cast approach works
on all Node 22.x versions.

Closes #264
Closes #250

tests/blob-to-text.test.ts

@@ -0,0 +1,39 @@
+import { describe, it, expect } from 'vitest'
+import { blobToText } from '../src/sqlite.js'
+
+describe('blobToText', () => {
+  it('returns empty string for null', () => {
+    expect(blobToText(null)).toBe('')
+  })
+
+  it('returns empty string for undefined', () => {
+    expect(blobToText(undefined)).toBe('')
+  })
+
+  it('passes through strings unchanged', () => {
+    expect(blobToText('hello world')).toBe('hello world')
+  })
+
+  it('decodes valid UTF-8 Uint8Array', () => {
+    const buf = new TextEncoder().encode('café ☕')
+    expect(blobToText(buf)).toBe('café ☕')
+  })
+
+  it('replaces invalid UTF-8 bytes with U+FFFD instead of crashing', () => {
+    const buf = new Uint8Array([0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x80, 0xfe])
+    const result = blobToText(buf)
+    expect(result).toContain('Hello')
+    expect(result).toContain('<27>')
+  })
+
+  it('handles truncated multi-byte sequence', () => {
+    // é in UTF-8 is [0xc3, 0xa9]. Truncate to just [0xc3].
+    const buf = new Uint8Array([0x63, 0x61, 0x66, 0xc3])
+    const result = blobToText(buf)
+    expect(result).toBe('caf<61>')
+  })
+
+  it('handles empty Uint8Array', () => {
+    expect(blobToText(new Uint8Array(0))).toBe('')
+  })
+})