Fix circular import, primary-admin NULL trap, and add gateway quota reset

Restores a working import graph and closes two data-correctness bugs, plus
adds a reset for the AI gateway's rolling 24h spend.

Circular import: database/__init__ -> engagement -> content -> utils ->
database made the package unimportable. get_project_devlog moves out of
database/engagement.py into content.py, where enrich_items already lives.

Primary administrator: _can_hold_primary_admin read is_active with
bool(row.get("is_active")), so an admin row whose is_active column is SQL
NULL (any row predating the column) was treated as deactivated and skipped.
Every other site defaults an unknown is_active to active; this one now does
too.

Profile JSON: xp_next_level and xp_progress_pct were computed but only put on
the top-level context, never on profile_user, so they serialised as null even
though UserOut declares them and the API docs document them as embedded there.

Gateway quota reset: a cap previously lifted only with the passage of time.
quota.reset upserts a watermark row into gateway_quota_resets, scoped by the
same three nullable dimensions as a quota rule, and spent_24h sums from
max(24h cutoff, watermark). No ledger row is deleted, so the cost analytics on
/admin/ai-usage stay intact. Reaches every surface: POST
/admin/gateway/quota-resets, a per-rule Reset spend button, the Devii tool
gateway_quota_reset (confirm-gated), devplace gateway quota reset, and the API
docs. Admin's Reset all quotas now stamps a global gateway watermark too,
which is what a caller stuck on "AI gateway daily quota exceeded" needed.

Startup: _backfill_gamification swept every xp=0 user on every boot in every
worker and could never converge, since a user with no content earns no XP.
It now intersects pending users with _milestone_candidates(). db.tables is a
live reflection, so it is hoisted out of the loops that probed it per row.

Docker: the dependency layer now depends on pyproject.toml only, so a source
edit no longer reinstalls every dependency and re-downloads Chromium.
Adds start_interval so the healthcheck probes during the start period, and a
docker-reload target, since docker-up does not restart an unchanged container.

Adds events.md, the audit event catalogue that README, CLAUDE.md, the quiz
docs and the tooling all referenced but which never existed: 288 keys across
28 categories, including the families built from a variable at the call site.

Test fixes: both devlog helpers dated post 0 as the newest while the tests
assumed post 2 was; a profile login posted username= to a form that takes
email=; a devlog assertion matched six buttons under strict mode; and the
primary-admin tests seeded founders newer than the back-dated fixture admin,
so they only passed without the api tier.

Full suite: 2989 passed, 1 skipped.

devplacepy/database/engagement.py

@@ -1,9 +1,6 @@
 # retoor <retoor@molodetz.nl>
 
-from .core import TTLCache, _in_clause, db, defaultdict, get_table
-from .pagination import paginate
-from devplacepy.content import enrich_items
-from .users import get_users_by_uids
+from .core import TTLCache, _in_clause, db, defaultdict
 
 
 _comment_count_cache = TTLCache(ttl=15, max_size=10000)
@@ -190,23 +187,3 @@ def get_poll_for_post(post_uid, user=None):
     return get_polls_by_post_uids([post_uid], user).get(post_uid)
 
 
-def get_project_devlog(project_uid: str, before: str | None = None, viewer: dict | None = None) -> tuple[list, str | None]:
-    posts_table = get_table("posts")
-    posts, next_cursor = paginate(
-        posts_table,
-        before=before,
-        viewer_uid=viewer["uid"] if viewer else None,
-        project_uid=project_uid,
-    )
-    if not posts:
-        return [], None
-
-    authors = get_users_by_uids([p["user_uid"] for p in posts])
-    counts = get_comment_counts_by_post_uids([p["uid"] for p in posts])
-
-    result = enrich_items(
-        posts, "post", authors, {"comment_count": counts}, user=viewer
-    )
-    return result, next_cursor
-
-