Add support for deepseek models

[rishsriv]

We add a deepseek runner to support evaluating deepseek models via their official API.

To verify that this works

deepseek-chat

python main.py \      
  -db postgres \
  -q "data/questions_gen_postgres.csv" "data/instruct_basic_postgres.csv" "data/instruct_advanced_postgres.csv" \
  -o results/deepseek_classic.csv results/deepseek_basic.csv results/deepseek_advanced.csv \
  -g deepseek \
  -f prompts/prompt_openai.json \
  -m deepseek-chat \
  -p 5 \
  -c 0

For v1

Correct so far: 188/210 (89.52%)
                 correct  error_db_exec
query_category                         
date_functions  0.800000       0.028571
group_by        1.000000       0.000000
instruct        0.914286       0.000000
order_by        0.914286       0.000000
ratio           0.771429       0.057143
table_join      0.971429       0.000000

For basic

Correct so far: 38/40 (95.00%)
                                   correct  error_db_exec
query_category                                           
basic_group_order_limit              1.000            0.0
basic_join_date_group_order_limit    0.875            0.0
basic_join_distinct                  1.000            0.0
basic_join_group_order_limit         0.875            0.0
basic_left_join                      1.000            0.0

For advanced

Correct so far: 54/64 (84.38%)
                              correct  error_db_exec
query_category                                      
instructions_cte_join          0.9375          0.000
instructions_cte_window        0.6250          0.000
instructions_date_join         0.7500          0.125
instructions_string_matching   1.0000          0.000
keywords_aggregate             0.8750          0.000
keywords_ratio                 0.8750          0.125

deepseek-reasoner

python main.py \      
  -db postgres \
  -q "data/questions_gen_postgres.csv" "data/instruct_basic_postgres.csv" "data/instruct_advanced_postgres.csv" \
  -o results/deepseek_classic.csv results/deepseek_basic.csv results/deepseek_advanced.csv \
  -g deepseek \
  -f prompts/prompt_openai_o1.json \
  -m deepseek-reasoner \
  -p 5 \
  -c 0

Taking too long to finish executing, but runs!