build(deps): bump coordinode-rs submodule to v0.3.15

- perf(storage): batch Extra-targeting deltas in DocumentMerge
- perf(codec): switch UidEncoder/Decoder to StreamVByte Coder1234
- perf(query): reuse adjacency key buffer in graph traversal hot path
- fix(query): percentileCont/percentileDisc now accept query parameters

No proto changes; stubs unchanged.

Update server image tag in docker-compose.yml and demo/docker-compose.yml
to 0.3.15; update demo/README.md version references.

Author: polaz

coordinode-rs

@@ -13,8 +13,8 @@ Interactive notebooks for LlamaIndex, LangChain, and LangGraph integrations.
 
 > **Note:** First run installs `coordinode-embedded` from source (Rust build, ~5 min).
 > Subsequent runs use Colab's pip cache.
-> Notebooks are pinned to a specific commit that bundles coordinode-rs v0.3.14 (embedded engine used in Colab).
-> The Docker Compose stack below uses the CoordiNode **server** image v0.3.14.
+> Notebooks are pinned to a specific commit that bundles coordinode-rs v0.3.15 (embedded engine used in Colab).
+> The Docker Compose stack below uses the CoordiNode **server** image v0.3.15.
 
 ## Run locally (Docker Compose)
 

demo/README.md

@@ -1,7 +1,7 @@
 services:
   coordinode:
     # Keep version in sync with root docker-compose.yml
-    image: ghcr.io/structured-world/coordinode:0.3.14
+    image: ghcr.io/structured-world/coordinode:0.3.15
     container_name: demo-coordinode
     ports:
       - "127.0.0.1:37080:7080"   # gRPC (native API) — localhost-only

demo/docker-compose.yml

@@ -7,7 +7,7 @@ version: "3.9"
 
 services:
   coordinode:
-    image: ghcr.io/structured-world/coordinode:0.3.14
+    image: ghcr.io/structured-world/coordinode:0.3.15
     container_name: coordinode
     ports:
       - "7080:7080"   # gRPC