chore: Added Celery as a new dependency.

app/requirements.txt

+amqp==5.1.1
+    # via kombu
+async-timeout==4.0.2
+    # via redis
+billiard==3.6.4.0
+    # via celery
 biopython==1.81
     # via -r requirements.in
 black==22.3.0
     # via -r requirements.in
+celery[redis]==5.2.7
+    # via
+    #   -r requirements.in
+    #   flower
 certifi==2022.12.7
     # via requests
 charset-normalizer==3.1.0
     # via requests
 click==8.1.3
-    # via black
+    # via
+    #   black
+    #   celery
+    #   click-didyoumean
+    #   click-plugins
+    #   click-repl
+click-didyoumean==0.3.0
+    # via celery
+click-plugins==1.1.1
+    # via celery
+click-repl==0.2.0
+    # via celery
 coverage[toml]==7.2.3
     # via pytest-cov
 environs==4.1.3
@@ -29,6 +50,10 @@ flake8-print==5.0.0
     # via -r requirements.in
 flake8-todo==0.7
     # via -r requirements.in
+flower==1.2.0
+    # via -r requirements.in
+humanize==4.6.0
+    # via flower
 idna==3.4
     # via requests
 iniconfig==2.0.0
@@ -37,6 +62,8 @@ isort==4.3.21
     # via
     #   -r requirements.in
     #   flake8-isort
+kombu==5.2.4
+    # via celery
 levenshtein==0.21.0
     # via -r requirements.in
 marshmallow==3.19.0
@@ -61,6 +88,10 @@ platformdirs==3.2.0
     # via black
 pluggy==1.0.0
     # via pytest
+prometheus-client==0.16.0
+    # via flower
+prompt-toolkit==3.0.38
+    # via click-repl
 pycodestyle==2.8.0
     # via
     #   flake8
@@ -84,17 +115,33 @@ python-dateutil==2.8.2
     # via faker
 python-dotenv==1.0.0
     # via environs
+pytz==2023.3
+    # via
+    #   celery
+    #   flower
 rapidfuzz==3.0.0
     # via levenshtein
+redis==4.5.4
+    # via celery
 requests==2.28.2
     # via -r requirements.in
 retry-decorator==1.1.1
     # via -r requirements.in
 six==1.16.0
     # via
+    #   click-repl
     #   pydocstyle
     #   python-dateutil
 snowballstemmer==2.2.0
     # via pydocstyle
+tornado==6.3
+    # via flower
 urllib3==1.26.15
     # via requests
+vine==5.0.0
+    # via
+    #   amqp
+    #   celery
+    #   kombu
+wcwidth==0.2.6
+    # via prompt-toolkit

requirements.in

@@ -4,6 +4,8 @@ retry-decorator==1.1.1
 Levenshtein~=0.21.0
 requests~=2.28.0
 biopython~=1.81
+celery[redis]~=5.2.7
+flower~=1.2.0
 
 # QA
 flake8==4.0.1