v0.17.3: bug-fix maintenance pass — ingest origin exemption, FK safety, auto-search reset, deterministic ingest, WAL, config centralization, dead-code removal

- /api/ingest exempt from origin check for CLI/Bearer clients
- recreate deleted conversations on bogus conversation_id (chat + search)
- augmented auto-search emits reset:true; frontend clears first-pass text
- image uploads stored as placeholders, never text-ingested
- check_fact_conflicts requires shared subject keywords
- deterministic ingest point ids (md5 chunk hash)
- get_load() no longer crashes when rocm-smi yields no VRAM lines
- SQLite WAL + busy_timeout; timing-safe API key compares
- supervise fire-and-forget auto-ingest tasks; log missing logprobs
- centralize EMBED_URL/EMBED_MODEL/QDRANT_URL/NODE_NAME in config
- remove dead triage.py, select_node tests, is_state_changing, stray artifacts
- add regression tests + autouse global-reset conftest

routers/completions.py

@@ -6,6 +6,7 @@ FIM (fill-in-the-middle) requests are proxied directly — not persisted.
 Chat-style requests are persisted to conversation history.
 Auth: static Bearer token via COMPLETIONS_API_KEY in config.
 """
+import hmac
 import json
 import logging
 import uuid
@@ -30,7 +31,7 @@ def _check_api_key(request: Request):
     if not auth.startswith("Bearer "):
         raise HTTPException(status_code=401, detail="Missing Bearer token")
     token = auth[7:].strip()
-    if token != COMPLETIONS_API_KEY:
+    if not hmac.compare_digest(token.encode(), COMPLETIONS_API_KEY.encode()):
         raise HTTPException(status_code=401, detail="Invalid API key")