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/__init__.py

@@ -8,7 +8,7 @@ from .users import get_users_by_uids, _admins_cache, invalidate_admins_cache, ge
 from .relations import _relations_cache, get_user_relations, get_blocked_uids, get_muted_uids, get_silenced_uids, invalidate_user_relations
 from .pagination import PAGE_SIZE, paginate, interleave_by_author, paginate_diverse, get_user_post_count, clear_user_post_count, build_pagination
 from .soft_delete import SOFT_DELETE_TABLES, ensure_soft_delete_columns, soft_delete, soft_delete_in, restore, purge, list_deleted, count_deleted, restore_event, purge_event
-from .engagement import _comment_count_cache, get_comment_counts_by_post_uids, get_post_counts_by_user_uids, get_project_devlog, get_vote_counts, get_user_votes, get_reactions_by_targets, get_user_bookmarks, get_polls_by_post_uids, get_poll_for_post
+from .engagement import _comment_count_cache, get_comment_counts_by_post_uids, get_post_counts_by_user_uids, get_vote_counts, get_user_votes, get_reactions_by_targets, get_user_bookmarks, get_polls_by_post_uids, get_poll_for_post
 from .usage import _add_usage, _get_usage, add_correction_usage, get_correction_usage, add_modifier_usage, get_modifier_usage, NEWS_USAGE_KEY, add_news_usage, get_news_usage, ISSUE_USAGE_KEY, add_issue_usage, get_issue_usage, SEO_USAGE_KEY, add_seo_usage, get_seo_usage, AWARD_USAGE_KEY, add_award_usage, get_award_usage
 from .awards import (
     AWARDS_PER_PAGE,
@@ -115,7 +115,6 @@ __all__ = [
     "_comment_count_cache",
     "get_comment_counts_by_post_uids",
     "get_post_counts_by_user_uids",
-    "get_project_devlog",
     "get_vote_counts",
     "get_user_votes",
     "get_reactions_by_targets",