CI: swap GitLab CI for Gitea Actions (remote is Gitea)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.gitea/workflows/test.yml

@@ -0,0 +1,11 @@
+name: tests
+on: [push, pull_request]
+
+jobs:
+  pytest:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: astral-sh/setup-uv@v5
+      - run: uv sync --frozen
+      - run: uv run pytest

.gitlab-ci.yml

@@ -1,13 +0,0 @@
-test:
-  image: ghcr.io/astral-sh/uv:python3.13-bookworm-slim
-  variables:
-    UV_CACHE_DIR: .uv-cache
-  cache:
-    key:
-      files:
-        - uv.lock
-    paths:
-      - .uv-cache
-  script:
-    - uv sync --frozen
-    - uv run pytest

NEXT_SESSION.md

@@ -10,9 +10,10 @@ architecture and conventions. Delete this file when the list is done.
 - **P0 DONE** (commit 6df25bcd, NOT yet pushed — push denied to agent, run
   `git push origin main`): .gitignore fixed and Takeout dump (23,673 files,
   personal health data) untracked; note it is still in remote history from
-  earlier pushes — rewrite history if that ever matters. `.gitlab-ci.yml`
-  added (assumes GitLab at g.o00.io; swap if Gitea/Forgejo). `gitlab` remote
-  URL typo (ttps://) fixed. `scripts/backup_db.sh` snapshots the DB, keeps 14.
+  earlier pushes — rewrite history if that ever matters. CI added at
+  `.gitea/workflows/test.yml` (remote g.o00.io is Gitea — Actions must be
+  enabled repo-side with a registered runner). `gitlab` remote URL typo
+  (ttps://) fixed. `scripts/backup_db.sh` snapshots the DB, keeps 14.
 - DB: `garmin/data/garmin.db` is canonical — 378 activities (→ 2026-05-10),
   349 FITs linked, wellness through 2026-05-17.
 - The stray `../data/garmin.db` (vault root) was a Takeout-ZIP ingest run from