Fix 9 seam-review findings

- Pinned target's profitability flag now overrides the extractor's bucket guess
- Extractor/target periods canonicalized so ledger forecast chaining matches
- autoRunOnDrop no longer error-loops on ungradeable inbox content; failed
  batches count as seen
- Ship 2 default graders (pipeline requires >=2 valid reports per deck)
- UI styles 'failed' deck chips as errors; .markdown discoverable
- Unknown adjudicator model disables adjudication loudly instead of silently
- Reserved rids extractor/adjudicator; teardown also clears bm-grader-* containers

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

orchestrator/decks.py

@@ -12,7 +12,7 @@ from __future__ import annotations
 import os
 import re
 
-SUPPORTED_EXTS = {".pdf", ".pptx", ".docx", ".txt", ".md", ".text"}
+SUPPORTED_EXTS = {".pdf", ".pptx", ".docx", ".txt", ".md", ".markdown", ".text"}
 
 # Canonical period forms: "2026-Q2", "2026-H1", "2026-05", "FY2026".
 _PERIOD_PATTERNS = [
@@ -55,6 +55,22 @@ def parse_period_from_name(filename: str) -> str | None:
     return None
 
 
+def canonicalize_period(text: str | None) -> str | None:
+    """Normalize a free-form period string ("2026-q2", "FY 2026", "2026/05")
+    to the canonical form, or None. Extractor-supplied periods and target
+    periods must pass through here so ledger lookups match filename periods."""
+    if not text:
+        return None
+    s = str(text).strip().replace("/", "-")
+    if period_sort_key(s) != _UNKNOWN_KEY:
+        return s  # already canonical
+    for pat, canon in _PERIOD_PATTERNS:
+        m = pat.search(s)
+        if m:
+            return canon(m)
+    return None
+
+
 def period_sort_key(period: str | None) -> tuple:
     """(year, start_month, granularity_rank); unknown/None sorts last."""
     if not period: