feat: add backup CLI commands, AI correction/modifier services, and timezone-aware date display

- Add `devplace backups` CLI subcommands (list, run, prune, clear) with job enqueueing and orphan cleanup
- Introduce `BACKUPS_DIR` and `BACKUP_STAGING_DIR` config paths for backup storage
- Implement `schedule_correction` and `schedule_modification` calls in content creation, comment creation, and comment editing flows
- Add `DEFAULT_CORRECTION_PROMPT` and `DEFAULT_MODIFIER_PROMPT` config constants for AI content processing
- Document timezone-aware date display using `local_dt`/`dt_ago` Jinja globals with client-side `Intl` localization
- Update README with AI content correction/modifier support in direct messages via `@ai` inline instructions
- Add `track_action(user["uid"], "vote")` call on upvote in `apply_vote`

devplacepy/routers/devrant/comments.py

@@ -14,6 +14,8 @@ from devplacepy.database import (
 )
 from devplacepy.content import apply_vote, delete_comment_record, is_owner, is_admin
 from devplacepy.services.audit import record as audit
+from devplacepy.services.correction import schedule_correction
+from devplacepy.services.ai_modifier import schedule_modification
 from devplacepy.services.devrant.params import merge_params
 from devplacepy.services.devrant.tokens import resolve_user
 from devplacepy.services.devrant.ids import as_int, comment_by_id
@@ -77,6 +79,8 @@ async def edit_comment(request: Request, comment_id: str):
         },
         ["uid"],
     )
+    schedule_correction(user, "comments", comment["uid"], request)
+    schedule_modification(user, "comments", comment["uid"], request)
     audit.record(
         request,
         "comment.edit",