fix: address CodeRabbit review comments

- tests/test_sqlitedb.py: remove erroneous db.password = None in make_db();
  password is a Client/schema field, not an attribute of SQLiteDB — assigning
  it to the raw object() bypassed the dataclass and had no effect
- spec.md: correct swapped VERSION_BUILD/VERSION_MINOR in acceptance criteria;
  the spec listed VERSION_BUILD = 1, VERSION_MINOR = 0 but version.py correctly
  uses VERSION_MINOR = 1, VERSION_BUILD = 0 for the 0.1.0 release

Skipped CodeRabbit suggestion:
- threading.Lock for write serialization (Minor): SQLite WAL mode already
  serializes writers internally; the plugin runs in a single-threaded
  hivemind-core context; adding a Lock would duplicate SQLite's own locking
  without practical benefit and is listed as a Non-Goal ("Multi-process locking
  beyond WAL mode") in spec.md

AI-Generated Change:
- Model: claude-sonnet-4-6
- Intent: apply valid CodeRabbit Minor suggestions
- Impact: cleaner test helper; accurate spec documentation
- Verified via: python -m pytest tests/ -p no:ovoscope -q (31 passed)

Author: JarbasAl

spec.md

@@ -43,6 +43,6 @@ Bring `hivemind-sqlite-database` to a stable `0.1.0` release. The plugin already
 - [ ] A test asserts that `len(db) == 0` on a fresh DB and increments correctly after `add_item`.
 - [ ] A test asserts that `list(db)` yields all rows including revoked ones.
 - [ ] A test asserts `add_item` returns `False` when a simulated `sqlite3.Error` is raised (mock or force an error).
-- [ ] `version.py` has `VERSION_BUILD = 1`, `VERSION_MINOR = 0` (or equivalent `0.1.0` string).
+- [ ] `version.py` has `VERSION_MINOR = 1`, `VERSION_BUILD = 0` (i.e., `0.1.0`).
 - [ ] GitHub Actions workflow file exists at `.github/workflows/` and references `pytest`.
 - [ ] The WAL pragma is confirmed active: a test opens an in-memory DB and asserts `PRAGMA journal_mode` returns `"wal"` — or at minimum the `__post_init__` code contains the pragma call.

tests/test_sqlitedb.py

@@ -16,7 +16,6 @@ def make_db() -> SQLiteDB:
     db = object.__new__(SQLiteDB)
     db.name = "clients"
     db.subfolder = "hivemind-core"
-    db.password = None
     db.conn = sqlite3.connect(":memory:", check_same_thread=False)
     db.conn.row_factory = sqlite3.Row
     db.conn.execute("PRAGMA journal_mode=WAL")