(U+74E6): Add `<-denotational@usage' for BUCS+74E6; unify MJ017540,

(U+74E6): Add `<-denotational@usage' for BUCS+74E6; unify MJ017540,
KOSEKI-240380 and DJT-07415.
(U+74E9): Apply new conventions for glyph granularity; add
`<-denotational@usage' for BUCS+74E9.
(U-00024B3D): New character; use `<-denotational' for A-IWDSU+24B3D.
(A-IWDSU+24B3D): New abstract node.
(U-00024B40): Apply new conventions for glyph granularity.
(U-00024B44): Likewise.
(U+74F8): Likewise; add `<-denotational@usage' for BUCS+74F8.
(U-00024B49): New character.
(U+3F29): Apply new conventions for glyph granularity.
(U-00024B52): Apply new conventions for glyph granularity.
(U+3F37): Likewise.
(A-cgnU+3F31): New abstract node.
(U+3F31): Add `<-denotational' for A-cgnU+3F31; apply new conventions
for glyph granularity.
(A-CB08707): New abstract node; use `<-denotational' for A-cgnU+3F31.
(CB08707): New character; use `<-denotational' for A-CB08707.
(U+750E): Add `<-denotational@usage' for BUCS+750E; apply new
conventions for glyph granularity.
(U+3F49): Apply new conventions for glyph granularity.
(U-00024BA6): Likewise.
(U-00024BA7): Likewise.
(BUCS+74E6): New abstract node; unify A2-DJT-07415.
(BUCS+74E9): New abstract node; unify A2-DJT-07417.
(BUCS+74F8): New abstract node; unify A2-DJT-07428.
(BUCS+750E): New abstract node; unify A2-DJT-07445.