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.

.claude/skills/new-branch/SKILL.md

@@ -0,0 +1,43 @@
+---
+name: new-branch
+description: Create a branch following the project's GitFlow Lite model
+---
+
+# /new-branch
+
+Cut a new branch under the GitFlow Lite model.
+
+## Branch model
+
+```
+master  = released / stable (tagged on release; protected)
+dev     = integration branch (protected)
+feat/*  = cut from dev  → PR → merge into dev
+fix/*   = cut from dev  → PR → merge into dev
+hotfix/* = cut from master → merge into master AND synced into dev (double merge)
+release  = dev → master + tag on master (no separate release branch)
+```
+
+## Steps
+
+1. Ask (or infer) the change type: `feat`, `fix`, or `hotfix`.
+2. Pick the parent:
+   - `feat/*`, `fix/*` → branch from **`dev`**.
+   - `hotfix/*` → branch from **`master`**.
+3. Update the parent first:
+   ```bash
+   git checkout <parent>
+   git pull --ff-only
+   ```
+4. Create the branch with a kebab-case slug:
+   ```bash
+   git checkout -b feat/<short-slug>
+   ```
+5. For a `hotfix`, remember it must later merge into **both** `master` and `dev`.
+
+## Naming
+
+- `feat/add-agentic-rerank`, `fix/empty-profile-crash`, `hotfix/lancedb-conn-leak`.
+- Lowercase, hyphen-separated, no spaces, concise.
+
+Never commit directly to `master` or `dev` — always via a branch + PR.