=== Report 1: Castell Fasteners traffic drop: seasonal pattern or anomaly across B2B wholesale merchants (written by Ines) ===
Engineer's note: YoY growth columns are blank (NULL) when the prior-year Q4 count is zero, per the request's definition; counts are raw web_sessions rows (all traffic, not deduplicated visitors).
REPORT: Castell Fasteners traffic drop: seasonal pattern or anomaly across B2B wholesale merchants
QUESTION: Is Castell Fasteners Q4 web traffic decline normal seasonal behavior shared by other B2B wholesale merchants, or a Castell-specific anomaly?
merchant_name                 | industry                  | sessions_q4_2023 | sessions_q4_2024 | sessions_q4_2025 | yoy_growth_pct_2024_to_2025 | yoy_growth_pct_2023_to_2024
------------------------------+---------------------------+------------------+------------------+------------------+-----------------------------+----------------------------
Ballycorran Industrial Supply | Industrial Supplies (B2B) |               62 |               75 |               87 |                        16.0 |                        21.0
OfficeHub Nordic              | Office Supplies (B2B)     |               32 |               37 |               69 |                        86.5 |                        15.6
Castell Fasteners             | Industrial Supplies (B2B) |               31 |               47 |               42 |                       -10.6 |                        51.6
Midland Safety Wear           | Industrial Supplies (B2B) |               26 |               36 |               40 |                        11.1 |                        38.5
Polder Packaging              | Industrial Supplies (B2B) |               17 |               14 |               26 |                        85.7 |                       -17.6
Deskline Supplies             | Office Supplies (B2B)     |               13 |               16 |               14 |                       -12.5 |                        23.1
(6 rows)