fix: address ds-review-bot v8 findings

- llm-deepseek: the uncatalogued resolveModel fallback declares text-only
  modalities — the wire route is text-only regardless of catalog
  membership, so "unknown" must not let the host persist-then-fail images.
- session.selectModel also consults the pending-inbox mirror: a queued
  image prompt enters the log only when claimed, after a switch would land.
- attachment store: ensureDurableDirectory syncs every ancestor entry up to
  a caller-vouched boundary regardless of what mkdir reports — a raced
  "already existed" is not "already durable".
- One image walker (imageBlockIn/imageInEvent) now serves both attachment
  authorization and the selection gate; referencedImage therefore also
  authorizes references inside wrapped message content.
- InputHub: the scope disposer resolves the conversation service optionally
  (teardown/HMR must reach quiescence), and a send failing after its scope
  died releases the in-flight drafts instead of restoring them onto a
  disposed shell.
- http-bridge destroys declared-oversize requests with connection: close
  instead of draining a body the client can trickle indefinitely.
- LlmService validates AND detaches modality arrays identically on the
  advisory and exact routes; READMEs record the fourth INVALID_MODEL_INFO
  rejection reason.
- CLI provider docs (JSDoc, README pair, Agent Note pair) describe the
  reuse behavior; llm-route.spec now parses the SHIPPED cordis.yml through
  the production extraction, pinning the row coupling.
- image-display lane pins gallery/rail shape in inline snapshots and the
  object-URL scheme this environment must take; stale host.schema comment
  dropped.

packages/attachment/attachment-local/tests/store.spec.ts

@@ -47,7 +47,7 @@ afterEach(async () => {
 })
 
 describe('local attachment store', () => {
-  it.skipIf(process.platform === 'win32')('syncs every newly created object ancestor before returning', async () => {
+  it.skipIf(process.platform === 'win32')('syncs every object ancestor up to the durable boundary before returning', async () => {
     const storageRoot = await root()
     const base = join(storageRoot, '..', '..')
     const sha256 = createHash('sha256').update(PNG).digest('hex')
@@ -57,12 +57,20 @@ describe('local attachment store', () => {
 
     await saveImageFile(storageRoot, { data: PNG, mediaType: 'image/png' }, LIMITS)
 
+    // Every level between each created directory and the vouched boundary
+    // syncs unconditionally — "already existed" is not "already durable"
+    // when a concurrent first save may have created but not yet synced it.
     expect(fsControl.syncedDirectories).toEqual([
+      // bucket chain: every parent entry between the bucket and the boundary.
       objects,
       storageRoot,
       join(storageRoot, '..'),
       base,
+      // staging chain re-walks the shared ancestors after creating tmp.
       storageRoot,
+      join(storageRoot, '..'),
+      base,
+      // publication: the settled object's bucket and its parent for the rename.
       bucket,
       objects,
     ])