reviewed

Name: TR_syzygy_interiorshowcase
Clean: Yes
Lighting: Settings okay
light_de_candle_07: causing slight greenlight due to position,  move it or use the 64 radius version to fix
light_de_candle_16: causing slight greenlight on tankard and plate, use the 64 radius version to fix
light_de_lantern_05: causing hard greenlight, swap to the 128 version to fix

Note on light radii, 256 is the default light setting for exteriors or large halls in manors or castles, 128/177 should be your defaults for lamps or hanging lanterns. Candles can be 128 but 64 is normally better for avoiding greenlight.

Northmarker: present, good
Fits exterior: Fits ex_hlaalu_b_14 as the claimant outlined.
Pathgrid: Doesnt cover the upper floor, *you will want to downscale the bed slightly so as there is enough room.
Illegal to Sleep Here: yes, correct
Gridsnap: good

Bleeders:
furn_crate_open_01: bleeding into rug
misc_de_pot_green_01: bleeding into sack
active_de_p_bed_04: bleeding into tapestry*
Misc_Inkwell: bleeding into desk
light_de_candle_07: bleeding into desk
T_De_StonewarePlate_03: bleeding through plate below it
T_De_StonewarePlate_01:bleeding into the table
ingred_ash_yam_01: bleeding though the bottom of basket

Floaters:
misc_de_pitcher_01: floating slightly over table
misc_de_goblet_01: resting unevenly on the table at an angle
misc_de_fishing_pole: not touching the wall
com_sack_01_chpfood5: floating over shelf
sc_paper plain: floating over desk x3
text_paper_roll_01: floating over desk
T_De_StonewarePlate_02: floating slightly over table
furn_de_p_chair_01: floating over floor

Both:
The clothing on top of the  cupboard is both too heavily bled into each other and likewise floating over the back of the cupboard, being that far back they would also be too hard for the player to see or reach which would make them pointless to include.

Other: 
too many tapestries, odd as this may sound you shouldn't have tapestries on every exposed wall, cut down the number by a third or half of what you have.
in_hlaalu_hall_stairsl this has left a corner pillar exposed on the top floor, you should used different pieces to complete that central pillar.

Fix all of the above issues and I will reccomend for promotion.