Normalize frontmatter taxonomy across 293 document transcriptions

Categories now match folder names (15 canonical values).
Types normalized to 25 canonical values per VAULT_MAP.md spec.
Context-aware mapping: W-2s→tax-form, lease files→lease, vet records→vet, etc.

documents/house/house_hunting/12421_sanford_st/elite_home_inspection_2022.md

@@ -1,6 +1,6 @@
 ---
 type: inspection
-category: house_hunting
+category: house
 person: xuewei_jiang, yanxin_lu
 date: 2022-03-21
 source: elite_home_inspection_2022.pdf

documents/house/house_hunting/12421_sanford_st/foundation_consultation_invoice.md

@@ -1,6 +1,6 @@
 ---
-type: invoice
-category: house_hunting
+type: receipt
+category: house
 person: xuewei_jiang
 date: 2022-03-16
 source: foundation-consultation-invoice.pdf

documents/house/house_hunting/12421_sanford_st/pid_report.md

@@ -1,6 +1,6 @@
 ---
-type: disclosure
-category: house_hunting
+type: deed
+category: house
 person: xuewei_jiang, yanxin_lu
 date: 2022-03-11
 source: pid_report.pdf

documents/house/house_hunting/12421_sanford_st/prelim.md

@@ -1,6 +1,6 @@
 ---
-type: title_report
-category: house_hunting
+type: deed
+category: house
 person: xuewei_jiang, yanxin_lu
 date: 2022-02-25
 source: prelim.pdf

documents/house/house_hunting/12421_sanford_st/sanford_listing_disclosure.md

@@ -1,6 +1,6 @@
 ---
-type: disclosure
-category: house_hunting
+type: deed
+category: house
 person: xuewei_jiang, yanxin_lu
 date: 2022-03-16
 source: sanford_listing_disclosure.pdf