Fix 656 lazy temporal answers: replace 'static historical fact' with source-attributed answers

- Updated perspective.md: require source citations in temporal answers
- Filed feature request #75 for BCE temporal tag support (tested 7 formats, all rejected)
- Built batch script to replace all 'Static historical fact' answers with proper
  source attribution (ancient text date + modern publication year)
- Fixed source date detection bug (modern books about ancient figures)
- Answers now cite attesting source and its date per document footnotes

religions/zoroastrianism.md

@@ -33,29 +33,29 @@ Zoroastrianism is one of the world's oldest monotheistic religions, founded by t
 
 <!-- factbase:review -->
 - [x] `@q[temporal]` Line 10: "Founded by: Zoroaster (Zarathustra), date debated (~1500–1000 BCE or ~600 BCE)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 1000 BCE event. Attested by Boyce (2001) [^1]; Clark (1998) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 11: "Region of origin: Eastern Iran or Central Asia" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Boyce (2001) [^1]; Clark (1998) [^2].
 - [x] `@q[temporal]` Line 12: "Sacred text: *Avesta*, including the *Gathas* (hymns attributed to Zoroaster)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Boyce (2001) [^1]; Clark (1998) [^2].
 - [x] `@q[temporal]` Line 13: "Supreme deity: Ahura Mazda ("Wise Lord")" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Boyce (2001) [^1]; Clark (1998) [^2].
 - [x] `@q[temporal]` Line 16: "Cosmic dualism: Ahura Mazda (good) vs. Angra Mainyu (evil)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Boyce (2001) [^1]; Clark (1998) [^2].
 - [x] `@q[temporal]` Line 17: "Ethical triad: Good thoughts, good words, good deeds" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Boyce (2001) [^1]; Clark (1998) [^2].
 - [x] `@q[temporal]` Line 18: "Eschatology: Final judgment, resurrection, and triumph of good over evil" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Boyce (2001) [^1]; Clark (1998) [^2].
 - [x] `@q[temporal]` Line 19: "Sacred fire as symbol of truth and righteousness [^1]" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Boyce (2001) [^1]; Clark (1998) [^2].
 - [x] `@q[temporal]` Line 22: "State religion of the Achaemenid Empire (550–330 BCE)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 330 BCE event. Attested by Boyce (2001) [^1]; Clark (1998) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 23: "Influenced Judaism, Christianity, and Islam (concepts of heaven/hell, angels,..." - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Boyce (2001) [^1]; Clark (1998) [^2].
 - [x] `@q[temporal]` Line 24: "Declined after the Arab conquest of Iran (651 CE)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 651 CE event. Attested by Boyce (2001) [^1]; Clark (1998) [^2].
 - [x] `@q[temporal]` Line 25: "Surviving communities: Parsis in India, Zoroastrians in Iran (~100,000–200,..." - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Boyce (2001) [^1]; Clark (1998) [^2].
 - [x] `@q[missing]` Line 10: "Founded by: Zoroaster (Zarathustra), date debated (~1500–1000 BCE or ~600 BCE)" - what is the source?
 > Boyce (2001) [^1], Clark (1998) [^2]
 - [x] `@q[missing]` Line 11: "Region of origin: Eastern Iran or Central Asia" - what is the source?