feat(nadia): Add database index and devlog query helper

Outcome: done
Changed: devplacepy/database/schema.py:45, devplacepy/database/engagement.py:3-5,194-210, devplacepy/database/__init__.py:11,118
Verified by: `python3 -m py_compile` on all three files — passed; `pyflakes` on engagement.py — clean (no warnings)
Findings: Index idx_posts_project_uid added to init_db at devplacepy/database/schema.py:45 (CREATE INDEX IF NOT EXISTS on posts.project_uid)
Findings: get_project_devlog(project_uid: str, before: str | None = None, viewer: dict | None = None) -> tuple[list, str | None] defined at devplacepy/database/engagement.py:194, returns (list of enriched post dicts, next_cursor) using paginate() with project_uid filter, auto-filtered for deleted_at IS NULL, batch helpers get_users_by_uids and get_comment_counts_by_post_uids, and enrich_items() for post enrichment including author, time_ago, my_vote, comment_count
Findings: get_project_devlog exported from devplacepy/database/__init__.py via import (line 11) and __all__ (line 118)
Open: None
Confidence: high - all acceptance criteria met, syntax verified, no warnings introduced

Typosaurus-Run: 45c0aee6df2649ffaa248729bdfd5841
Typosaurus-Node: 17f01a1e325e40ecb73ffe423f78c4a9
Typosaurus-Agent: @nadia
Refs: #135

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_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_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 .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,
@@ -115,6 +115,7 @@ __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",
@@ -254,3 +255,5 @@ __all__ = [
     "backfill_api_keys",
     "_backfill_gamification",
 ]
+
+