build: include migrating timeseries

[joseph-sentry]

Follow up to: #1167

we previously did not include timeseries in INSTALLED_APPS
and we did not include it in the migrate-timeseries.sh script

but there's no good reason for that, and we should try to migrate
all apps and databases if we can

i think monorepo fixes this in some way but for now we should do this
and when we move over to the monorepo we should take a second look
at all these different scripts and try to consolidate the logic

[seer-by-sentry]

✅ Sentry found no issues in your recent changes ✅

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 20 lines in your changes missing coverage. Please review.

Project coverage is 97.72%. Comparing base (87f463e) to head (63614a8).
Report is 3 commits behind head on main.

❗ Current head 63614a8 differs from pull request most recent head 38511a9

Please upload reports for the commit 38511a9 to get more accurate results.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
migrate_timeseries.py	0.00%	20 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1168      +/-   ##
==========================================
- Coverage   97.77%   97.72%   -0.06%     
==========================================
  Files         448      449       +1     
  Lines       36823    36866      +43     
==========================================
+ Hits        36004    36026      +22     
- Misses        819      840      +21     

Flag	Coverage Δ
integration	42.89% <0.00%> (+0.02%)	⬆️
unit	90.41% <0.00%> (-0.11%)	⬇️

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Codecov Report

Attention: Patch coverage is 0% with 20 lines in your changes missing coverage. Please review.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
migrate_timeseries.py	0.00%	20 Missing ⚠️

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[matt-codecov]

if nothing is broken deploy next week since it's late on friday