Drop six unreferenced functions:
- db.py: upsert_symbol, upsert_reference, upsert_embedding (parser.py
  performs writes inline through batch_insert_embeddings and direct
  cursor calls; these helpers had no callers)
- logging_config.py: get_parser_logger, get_git_logger
- validation.py: validate_path_in_directory

Also fix the transaction() docstring example to reference upsert_file,
which is the actual function used in parser.py:594.

Verified with the find_dead_code MCP tool (0 candidates after removal)
and pytest on the touched modules (59 tests pass).

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* Restructure as code_memory package and bump to 1.0.32

- Move sources into a `code_memory/` package so `pip install code-memory`
  stops shipping top-level modules (`db`, `parser`, `queries`, etc.) into
  users' site-packages. Convert intra-package imports to relative; tests
  now use absolute `from code_memory import ...`. Remove sys.path hacks
  from conftest.py and test_dead_code.py.
- Delete unused test_pydantic.py debug script that previously shipped in
  the wheel.
- Fix author name typo (Lambert -> Lamba) in pyproject.toml.
- Expand CI mypy from 3 files to the whole `code_memory` package, with
  per-module `ignore_errors` overrides for 4 modules pending type cleanup
  (db, doc_parser, git_search, parser).
- Expand CI test matrix to ubuntu, macos, and windows runners with
  fail-fast disabled.
- Extract `_hint_if_unindexed` helper in server.py and remove all 6 stale
  `# type: ignore[typeddict-unknown-key]` annotations (the `hint` field
  is already declared as NotRequired in api_types).
- Bump version 1.0.31 -> 1.0.32 in pyproject.toml, server.json (x2), uv.lock.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* Fix path-equality tests on macOS

`validate_directory`/`validate_file` resolve symlinks (intentional —
collapses `..` and normalises). On macOS, `/tmp` is a symlink to
`/private/tmp`, so the resolved result diverges from the unresolved
tempdir path. Compare against `.resolve()` instead.

Surfaced by the new ubuntu/macos/windows CI matrix.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* Tolerate Windows tempdir cleanup errors in tests

`get_db()` opens a sqlite3 connection but tools (e.g. find_dead_code)
don't explicitly close it. On Linux/macOS this is harmless since the
OS happily unlinks open files, but on Windows the .db file stays
locked until the Connection is GC'd, which can outlive the fixture
and break `TemporaryDirectory.cleanup()`.

Pass `ignore_cleanup_errors=True` so the teardown is best-effort.
Fixing the underlying connection leak is a separate concern.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>