chore: initialize EverOS 1.0.0

md-first memory extraction framework for AI agents.

Markdown is the single source of truth; SQLite holds state and LanceDB
provides the rebuildable vector + BM25 + scalar index. The codebase follows
a single-direction DDD layering (entrypoints -> service -> memory -> infra,
with component / core / config cross-cutting) enforced by import-linter.

Engineering surface:
- Coding conventions in .claude/rules/ (path-scoped) and workflows in
  .claude/skills/ (/commit, /new-branch, /pr).
- GitHub Actions CI runs make lint + test + integration; pre-commit mirrors
  the gates locally (ruff, hygiene hooks, gitlint commit-msg).
- Commit messages follow Conventional Commits, enforced by gitlint.
- make lint also enforces datetime two-zone discipline and OpenAPI drift.

tests/conftest.py

@@ -0,0 +1,54 @@
+"""Shared pytest fixtures.
+
+Cache invalidation:
+    ``load_settings`` (and the timezone helper that reads it) are
+    ``functools.cache``-d for hot paths in production. Tests that
+    monkeypatch ``EVEROS_*`` env vars must see fresh settings on each
+    function — clear both caches around every test to keep results
+    deterministic regardless of declaration order.
+
+Cross-suite fixtures:
+    ``long_conversation`` lives here (not under ``tests/e2e/conftest.py``)
+    because both ``tests/e2e/`` and ``tests/integration/search/`` depend
+    on it — pytest conftest cascades down the directory tree, so a
+    fixture defined under ``tests/e2e/`` is invisible to siblings.
+"""
+
+from __future__ import annotations
+
+import json
+from collections.abc import Iterator
+from pathlib import Path
+
+import pytest
+
+_FIXTURE_DIR = Path(__file__).resolve().parent / "fixtures"
+_LONG_CONV_PATH = _FIXTURE_DIR / "long_conversation_locomo_caroline_melanie.json"
+
+
+@pytest.fixture(autouse=True)
+def _reset_settings_cache() -> Iterator[None]:
+    import structlog
+
+    from everos.component.utils import datetime as dt_module
+    from everos.config import load_settings
+
+    # ``configure_logging`` (called by some e2e fixtures / the CLI entry)
+    # sets ``cache_logger_on_first_use=True``; once a logger is cached,
+    # ``structlog.testing.capture_logs`` can no longer intercept events,
+    # which silently breaks log-assertion tests that run *after* it in the
+    # same process. Reset structlog to defaults around every test so that
+    # global config never leaks across the suite.
+    structlog.reset_defaults()
+    load_settings.cache_clear()
+    dt_module._display_tz.cache_clear()
+    yield
+    structlog.reset_defaults()
+    load_settings.cache_clear()
+    dt_module._display_tz.cache_clear()
+
+
+@pytest.fixture(scope="session")
+def long_conversation() -> dict:
+    """LoCoMo conv_0 fixture (419 messages, 19 batches, one session)."""
+    return json.loads(_LONG_CONV_PATH.read_text())