fix: fallback to repo .env for reader pipeline settings

src/summary_mcp/workflows/freshrss_pipeline.py

@@ -6,6 +6,8 @@ from datetime import date, datetime, timezone
 from pathlib import Path
 from typing import Any
 
+from dotenv import dotenv_values
+
 from summary_mcp.core.keyword_index import persist_keyword_indexes
 from summary_mcp.core.pipeline import extract_content
 from summary_mcp.core.summary_loop import resolve_llm_settings, run_loop_payload
@@ -40,6 +42,7 @@ DEFAULT_TERM_ALIASES_PATH = REPO_ROOT / "configs" / "term_aliases.json"
 DEFAULT_TERM_STOPWORDS_PATH = REPO_ROOT / "configs" / "term_stopwords.json"
 DEFAULT_TERM_DAILY_DIR = DATA_ROOT / "daily"
 DEFAULT_TERM_STATS_PATH = DATA_ROOT / "term_stats.json"
+DEFAULT_DOTENV_PATH = REPO_ROOT / ".env"
 WORKFLOW_NAME = "freshrss_daily_digest"
 RUN_TYPE = "daily_digest"
 FETCH_STAGE = "fetch_feed"
@@ -59,14 +62,27 @@ def _load_json(path: Path) -> dict[str, Any]:
     return json.loads(path.read_text(encoding="utf-8-sig"))
 
 
-def _load_required_env(name: str, value: str | None) -> str:
+def _load_repo_dotenv() -> dict[str, str]:
+    if not DEFAULT_DOTENV_PATH.exists():
+        return {}
+    return {
+        key: value
+        for key, value in dotenv_values(DEFAULT_DOTENV_PATH).items()
+        if isinstance(key, str) and isinstance(value, str) and value
+    }
+
+
+def _load_required_env(name: str, value: str | None, dotenv_map: dict[str, str] | None = None) -> str:
     if value:
         return value
     env_value = os.environ.get(name)
     if env_value:
         return env_value
+    dotenv_value = (dotenv_map or {}).get(name)
+    if dotenv_value:
+        return dotenv_value
     raise RuntimeError(
-        f"Missing required value '{name}': not passed as argument and not set as environment variable."
+        f"Missing required value '{name}': not passed as argument, not set as environment variable, and not found in {DEFAULT_DOTENV_PATH}."
     )
 
 
@@ -243,9 +259,10 @@ def run_freshrss_pipeline(
 
     try:
         run_store.start_stage(FETCH_STAGE, outputs={"output_dir": str(resolved_output_dir)})
-        resolved_api_base_url = _load_required_env("FRESHRSS_API_BASE_URL", api_base_url)
-        resolved_username = _load_required_env("FRESHRSS_USERNAME", username)
-        resolved_api_password = _load_required_env("FRESHRSS_API_PASSWORD", api_password)
+        dotenv_map = _load_repo_dotenv()
+        resolved_api_base_url = _load_required_env("FRESHRSS_API_BASE_URL", api_base_url, dotenv_map)
+        resolved_username = _load_required_env("FRESHRSS_USERNAME", username, dotenv_map)
+        resolved_api_password = _load_required_env("FRESHRSS_API_PASSWORD", api_password, dotenv_map)
         resolved_llm_api_key, resolved_llm_model, resolved_llm_api_url = resolve_llm_settings(
             api_key=llm_api_key,
             model=llm_model,