fediverse: публикация в GoToSocial (@vesti@dedinit.ru) из publisher-service

- gotosocial.py: клиент GtS (httpx): post_status (markdown), upload_media v2, verify_credentials, delete_status
- config.py: gt_social_url/token/visibility/format/channels
- channels.py: fediverse-каналы (VESTI_GTS_CHANNELS, префикс gt:), gt: уходит только в fediverse
- main.py: _publish_gotosocial + healthz-блок gotosocial + dry_run; status_id (ULID) в ответе
- .env.example: GT_SOCIAL_* и VESTI_GTS_CHANNELS
- STATUS.md/WALKTHROUGH.md: fediverse-раздел, хронология
- openspec: change gotosocial-publisher (proposal/design/tasks/specs), validate чисто

services/publisher/app/config.py

@@ -32,6 +32,12 @@ class Settings:
     channels: list[str] = None  # type: ignore
     port: int = 8410
     api_base: str = "https://api.telegram.org"
+    # GoToSocial (fediverse, Mastodon-совместимый API)
+    gt_social_url: str = ""
+    gt_social_token: str = ""
+    gt_social_visibility: str = "public"
+    gt_social_format: str = "markdown"
+    gt_social_channels: list[str] = None  # type: ignore
 
     def __post_init__(self):
         if self.channels is None:
@@ -39,6 +45,12 @@ class Settings:
         self.bot_token = self.bot_token or os.getenv("VESTI_BOT_TOKEN", "")
         self.tg_proxy = self.tg_proxy or os.getenv("TG_PROXY", "socks5://127.0.0.1:1080")
         self.port = self.port or int(os.getenv("PUBLISHER_PORT", "8410"))
+        self.gt_social_url = self.gt_social_url or os.getenv("GT_SOCIAL_URL", "")
+        self.gt_social_token = self.gt_social_token or os.getenv("GT_SOCIAL_ACCESS_TOKEN", "")
+        self.gt_social_visibility = self.gt_social_visibility or os.getenv("GT_SOCIAL_VISIBILITY", "public")
+        self.gt_social_format = self.gt_social_format or os.getenv("GT_SOCIAL_FORMAT", "markdown")
+        if self.gt_social_channels is None:
+            self.gt_social_channels = _channels_list(os.getenv("VESTI_GTS_CHANNELS", ""))
 
 
 settings = Settings()