feat: add deepsearch research system with CLI prune/clear and database schema

Implement a multi-agent deep web research subsystem including CLI commands for pruning expired jobs and clearing all artifacts, database tables for sessions/messages/URL cache with indexes, config paths for chroma storage, and internal embed URL for vector operations.

devplacepy/config.py

@@ -25,6 +25,8 @@ ZIPS_DIR = DATA_DIR / "zips"
 ZIP_STAGING_DIR = DATA_DIR / "zip_staging"
 FORK_STAGING_DIR = DATA_DIR / "fork_staging"
 SEO_REPORTS_DIR = DATA_DIR / "seo_reports"
+DEEPSEARCH_DIR = DATA_DIR / "deepsearch"
+DEEPSEARCH_CHROMA_DIR = DEEPSEARCH_DIR / "chroma"
 KEYS_DIR = DATA_DIR / "keys"
 BOT_DIR = DATA_DIR / "bot"
 LOCKS_DIR = DATA_DIR / "locks"
@@ -52,6 +54,7 @@ INTERNAL_BASE_URL = environ.get(
     "DEVPLACE_INTERNAL_BASE_URL", f"http://localhost:{PORT}"
 ).rstrip("/")
 INTERNAL_GATEWAY_URL = f"{INTERNAL_BASE_URL}/openai/v1/chat/completions"
+INTERNAL_EMBED_URL = f"{INTERNAL_BASE_URL}/openai/v1/embeddings"
 INTERNAL_MODEL = "molodetz"
 INTERNAL_EMBED_MODEL = "molodetz~embed"
 
@@ -86,6 +89,8 @@ DATA_PATHS: dict[str, Path] = {
     "zip_staging": ZIP_STAGING_DIR,
     "fork_staging": FORK_STAGING_DIR,
     "seo_reports": SEO_REPORTS_DIR,
+    "deepsearch": DEEPSEARCH_DIR,
+    "deepsearch_chroma": DEEPSEARCH_CHROMA_DIR,
     "keys": KEYS_DIR,
     "bot": BOT_DIR,
     "locks": LOCKS_DIR,