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

cities/rome.md

@@ -35,29 +35,29 @@ Rome, the "Eternal City," was the capital of the Roman Republic and Empire, grow
 
 <!-- factbase:review -->
 - [x] `@q[temporal]` Line 10: "Location: Central Italy, on the Tiber River" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 11: "Traditional founding: 753 BCE (Romulus and Remus legend)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 753 BCE event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 12: "Peak population: ~1 million by the 2nd century CE" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 13: "Key hills: Palatine, Capitoline, Aventine, and four others ("Seven Hills")" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 16: "Roman Forum: Political and commercial center of the Republic and Empire" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 17: "Colosseum (Flavian Amphitheatre): Completed ~80 CE, capacity ~50,000 [^1]" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 80 CE event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 18: "Pantheon: Rebuilt by Hadrian ~125 CE, largest unreinforced concrete dome" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 125 CE event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 19: "Circus Maximus: Chariot racing venue, capacity ~250,000" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 20: "Baths of Caracalla and Diocletian" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 21: "Aqueducts: 11 aqueducts supplied ~1 million cubic meters of water daily" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 24: "Capital of a republic (509–27 BCE) and empire (27 BCE–476 CE)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 27 BCE event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 25: "Center of Roman law, engineering, and administration" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 26: Malformed temporal tag @t[=410] — see docs for valid syntax
 > Fix to @t[0410] - use 4-digit year format.
 - [x] `@q[temporal]` Line 27: Malformed temporal tag @t[=476] — see docs for valid syntax