Fix PyInstaller cache hash mismatch by excluding build/dist directories

The compute_source_hash() function was including files from the build/
directory (generated by PyInstaller during the same run), causing the hash
computed at check time (before build/) to differ from the hash at save time
(after build/ exists). This made the cache always miss.

Fix: exclude build/, dist/, and __pycache__/ from the hash computation.
These are all build artifacts that don't affect the PyInstaller input.

Author: JackieTien97

CLAUDE.md

@@ -173,6 +173,7 @@ Generated source directories that need to be on the source path:
 ### Code Style
 
 - **Always run `mvn spotless:apply` after editing Java files**: Spotless runs `spotless:check` automatically during the `compile` phase. Format violations cause an immediate BUILD FAILURE. Make it a habit to run `mvn spotless:apply -pl <module>` right after editing, not at the end. For files under `integration-test/`, add `-P with-integration-tests`.
+- **Always run `black` and `isort` after editing Python files under `iotdb-core/ainode/`**: The AINode Code Style Check CI runs `black --check .` and `isort --check-only --profile black .` on that directory. Run `cd iotdb-core/ainode && black . && isort --profile black .` before committing. Requires `pip install black==25.1.0 isort==6.0.1`.
 - **Gson version compatibility**: `JsonObject.isEmpty()` / `JsonArray.isEmpty()` may not be available in the Gson version used by this project. Use `size() > 0` instead and add a comment explaining why.
 
 ## Git Commit

iotdb-core/ainode/build_binary.py

@@ -329,8 +329,14 @@ def compute_source_hash(script_dir):
 
     hash_targets = []
 
+    excluded_dirs = {"build", "dist", "__pycache__"}
+
     for pattern in ("**/*.py", "**/*.spec"):
-        hash_targets.extend(script_dir.glob(pattern))
+        for f in script_dir.glob(pattern):
+            if not any(
+                part in excluded_dirs for part in f.relative_to(script_dir).parts
+            ):
+                hash_targets.append(f)
 
     for name in ("pyproject.toml", "poetry.lock"):
         f = script_dir / name