docs: restore long-term Strategy and separate six-month horizons

scripts/connected-strategy.test.mjs

@@ -7,9 +7,9 @@ const coverage=JSON.parse(read('research/ai-adoption/strategy-coverage.json')).r
 
 test('connected Strategy covers every canonical route and reader handoff',()=>{
  const files=readdirSync('docs/strategy',{recursive:true}).filter(p=>p.endsWith('.mdx')).map(p=>'docs/strategy/'+p).sort();
- assert.equal(coverage.length,28);
+ assert.equal(coverage.length,30);
  assert.deepEqual(coverage.map(r=>r.source).sort(),files);
- assert.equal(new Set(coverage.map(r=>r.route)).size,28);
+ assert.equal(new Set(coverage.map(r=>r.route)).size,30);
  for(const r of coverage){
   for(const k of ['question','inputs','action_or_decision','output','next_or_feedback','review'])assert(r[k],`${r.source}: ${k}`);
   const page=read(r.source);assert(!/roadmap gates|Evidence-gated phases/.test(page),r.source);