feat: settle a file only when the run uses it

hle_fallback needs the file to change the run: Beetle PSX hashes every file of its folder, so opened is not used. PCSX-ReARMed hides the BIOS logo by default: its BIOS load line stands for the bios stage. A check runs again only when the oracle entries of its content and core change, and the rules run on every pass from the kept records.

scripts/core_probe.py

@@ -1173,8 +1173,9 @@ DEFAULT_ORACLE = ROOT / "tests" / "campaign" / "oracle.yml"
 
 def oracle_for(data: dict, content_sha1: str | None, library_name: str | None) -> dict:
     """The oracle entries that judge one content on one core: its reference
-    frames, the error patterns every core shares and the core's own, and the
-    core's known error screens."""
+    frames, the error patterns every core shares and the core's own, the
+    core's known error screens, and the log lines by which it says it loaded
+    the console's own BIOS."""
     core = (data.get("cores") or {}).get(library_name or "") or {}
     references: list[dict] = []
     for item in data.get("content") or ():
@@ -1185,7 +1186,9 @@ def oracle_for(data: dict, content_sha1: str | None, library_name: str | None) -
     patterns = [p["pattern"] for p in (data.get("error_patterns") or ())]
     patterns += [p["pattern"] for p in core.get("error_patterns") or ()]
     screens = [{"sha1": s["sha1"], "shows": s["shows"]} for s in core.get("error_screens") or ()]
-    return {"references": references, "error_patterns": patterns, "error_screens": screens}
+    loaded = [p["pattern"] for p in core.get("bios_patterns") or ()]
+    return {"references": references, "error_patterns": patterns, "error_screens": screens,
+            "bios_patterns": loaded}
 
 
 def sampled(rep: dict) -> list[tuple[int, str]]:
@@ -1218,6 +1221,11 @@ def judge(rep: dict, oracle: dict) -> tuple[str, dict]:
     references = {r["sha1"]: r for r in oracle.get("references") or ()}
     reached = [(frame, digest) for frame, digest in frames if digest in references]
     stages = list(dict.fromkeys(references[d]["stage"] for _, d in reached))
+    # A core that hides the BIOS screens by default still says it loaded one.
+    if "bios" not in stages and any(re.search(pattern, line["text"])
+                                    for pattern in oracle.get("bios_patterns") or ()
+                                    for line in rep.get("logs") or ()):
+        stages.insert(0, "bios")
     game = [(frame, digest) for frame, digest in reached if references[digest]["stage"] == "game"]
     if game:
         frame, digest = game[0]