feat(client,adapters,demo): schema DDL API, full-text search, Colab notebooks

## Client (coordinode)

- create_label(name, properties, *, schema_mode) — node label DDL (strict/validated/flexible)
- create_edge_type(name, properties, *, schema_mode) — edge type DDL
- create_text_index(name, label, properties, *, language) / drop_text_index(name)
  with Cypher identifier validation and consistent ValueError surface
- text_search(label, query, *, limit) — BM25 full-text search via TextService gRPC
- hybrid_text_vector_search(label, query, vector, ...) — BM25 + cosine RRF fusion
- LabelInfo, EdgeTypeInfo, TextIndexInfo, HybridResult result types
- Fix isinstance union syntax (UP038) in _types.py for Python >=3.11

## Adapters (langchain, llama-index)

- client= parameter on CoordinodeGraph and CoordinodePropertyGraphStore
- callable(getattr()) guards for optional methods (vector_search, get_schema_text)
- refresh_schema() uses get_labels() / get_edge_types() structured API
  with _parse_schema() fallback and _structured_to_text() backfill
- Remove MERGE split workarounds — SET r += {} supported since v0.3.12

## Demo

- 4 Google Colab-ready notebooks with IN_COLAB guard and pinned SDK install
- demo/Dockerfile.jupyter pinned to jupyter/scipy-notebook:python-3.11.6
- demo/docker-compose.yml with /health readiness probe and Jupyter on 127.0.0.1:38888
- Notebook health checks: if not client.health(): raise RuntimeError(...)

## Infrastructure

- Bump coordinode-rs submodule to v0.3.15
- Update proto submodule (SchemaMode, ComputedPropertyDefinition, TextService, DecommissionNode)
- Regenerate proto stubs
- ruff.toml: exclude submodule, .ipynb_checkpoints, per-file ignores for notebooks
- .gitignore: version files, DEVLOG*.md, .ipynb_checkpoints

## Tests

- tests/unit/test_schema_crud.py: +8 tests (property validation, bool enforcement, schema_mode)
- tests/integration/test_sdk.py: +12 tests (FTS with explicit index lifecycle, schema_mode,
  Cypher identifier validation, hybrid search, DETACH DELETE cleanup)

Related to #22

Author: polaz

.gitignore

@@ -18,7 +18,13 @@ env/
 
 # Version files generated by hatch-vcs
 coordinode/_version.py
+coordinode/coordinode/_version.py
 langchain-coordinode/langchain_coordinode/_version.py
 llama-index-coordinode/llama_index/graph_stores/coordinode/_version.py
+
+# Local dev / arch docs — not part of the SDK
 GAPS.md
 CLAUDE.md
+DEVLOG*.md
+
+**/.ipynb_checkpoints/

coordinode-embedded/python/coordinode_embedded/_coordinode_embedded.pyi

@@ -23,7 +23,6 @@ class LocalClient:
     """
 
     def __init__(self, path: str) -> None: ...
-
     def cypher(
         self,
         query: str,
@@ -48,6 +47,6 @@ class LocalClient:
         """
         ...
 
-    def __enter__(self) -> "LocalClient": ...
+    def __enter__(self) -> LocalClient: ...
     def __exit__(self, exc_type: Any, exc_val: Any, exc_tb: Any) -> bool: ...
     def __repr__(self) -> str: ...

coordinode-rs

@@ -23,9 +23,12 @@
     CoordinodeClient,
     EdgeResult,
     EdgeTypeInfo,
+    HybridResult,
     LabelInfo,
     NodeResult,
     PropertyDefinitionInfo,
+    TextIndexInfo,
+    TextResult,
     TraverseResult,
     VectorResult,
 )
@@ -40,8 +43,11 @@
     "NodeResult",
     "EdgeResult",
     "VectorResult",
+    "TextResult",
+    "HybridResult",
     "LabelInfo",
     "EdgeTypeInfo",
     "PropertyDefinitionInfo",
+    "TextIndexInfo",
     "TraverseResult",
 ]

coordinode/coordinode/__init__.py

@@ -33,11 +33,13 @@ def to_property_value(py_val: PyValue) -> Any:
         pv.string_value = py_val
     elif isinstance(py_val, bytes):
         pv.bytes_value = py_val
-    elif isinstance(py_val, (list, tuple)):
+    elif isinstance(py_val, list | tuple):
         # Homogeneous float list → Vector; mixed/str list → PropertyList.
         # bool is a subclass of int, so exclude it explicitly — [True, False] must
         # not be serialised as a Vector of 1.0/0.0 but as a PropertyList.
-        if py_val and all(isinstance(v, (int, float)) and not isinstance(v, bool) for v in py_val):
+        # list | tuple union syntax is valid in isinstance() for Python ≥3.10 (PEP 604).
+        # This project targets Python ≥3.11 (pyproject.toml: requires-python = ">=3.11").
+        if py_val and all(isinstance(v, int | float) and not isinstance(v, bool) for v in py_val):
             vec = Vector(values=[float(v) for v in py_val])
             pv.vector_value.CopyFrom(vec)
         else: