Block Display entities ignore precise positioning and transformations (always snap to block center)

Block Display entities do not respect precise positioning (fractional coordinates) or transformations (like translation and scale).
Although the data stores the correct coordinates and transformations, they always appear snapped to the center of a block when rendered in-game. This affects all block types tested (e.g., glass_pane, stone).

Steps to Reproduce:

1. Place a Block Display using fractional coordinates:

/summon minecraft:block_display 58.5 69 451.5 {block_state:{Name:"minecraft:stone"}}

1. Confirm data is stored correctly:

/data get entity @e[type=minecraft:block_display,limit=1,sort=nearest]

Example output:

Pos: [58.5d, 69.0d, 451.5d]

1. Observe the Block Display in-game:
   Instead of appearing at 58.5 69 451.5, it renders at 59 69 451, always snapped to the nearest full block center.

2. Try applying transformations, like translation:

/summon minecraft:block_display 58.5 69 451.5 {block_state:{Name:"minecraft:stone"}, transformation:{translation:[2.0f,0.0f,0.0f]}}

Result: No visible translation applied, entity remains in the same snapped position.

Expected Result:

• Block Display should appear exactly at the provided coordinates, including fractional positions.

• transformation.translation and other transformations (like scale, rotation) should visibly affect the Block Display's position and appearance.

Observed Result:

• Block Display ignores fractional coordinates and always snaps to block center.

• transformation data is stored, but has no visible effect on the Block Display.

• All Block Displays (tested with glass_pane, stone, and others) are affected.