pin JET to <= 0.10.6

[penelopeysm]

v0.10.7 has a new method for detecting potentially undefined variables which causes any model with product_distribution([InverseGamma(2, 3), InverseGamma(2, 3)]) to fail JET tests.

See #1040

I'm not sure if it's a JET issue per se but I've reported this at aviatesk/JET.jl#749 and we can see where to go.
(Update: JET is behaving right, I'll report it on SpecialFunctions.)

In the meantime to make CI pass this PR pins JET to <= v0.10.6.

Closes #1040

[github-actions]

Benchmark Report for Commit 51383c2

Computer Information

Julia Version 1.11.7
Commit f2b3dbda30a (2025-09-08 12:10 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: Linux (x86_64-linux-gnu)
  CPU: 4 × AMD EPYC 7763 64-Core Processor
  WORD_SIZE: 64
  LLVM: libLLVM-16.0.6 (ORCJIT, znver3)
Threads: 1 default, 0 interactive, 1 GC (on 4 virtual cores)

Benchmark Results

|                 Model | Dimension |  AD Backend |      VarInfo Type | Linked | Eval Time / Ref Time | AD Time / Eval Time |
|-----------------------|-----------|-------------|-------------------|--------|----------------------|---------------------|
| Simple assume observe |         1 | forwarddiff |             typed |  false |                  8.3 |                 1.6 |
|           Smorgasbord |       201 | forwarddiff |             typed |  false |                654.2 |                42.2 |
|           Smorgasbord |       201 | forwarddiff | simple_namedtuple |   true |                428.8 |                52.0 |
|           Smorgasbord |       201 | forwarddiff |           untyped |   true |               1206.9 |                29.1 |
|           Smorgasbord |       201 | forwarddiff |       simple_dict |   true |               6552.2 |                29.8 |
|           Smorgasbord |       201 | reversediff |             typed |   true |               1481.8 |                28.4 |
|           Smorgasbord |       201 |    mooncake |             typed |   true |               1010.6 |                 4.5 |
|    Loop univariate 1k |      1000 |    mooncake |             typed |   true |               5775.3 |                 4.3 |
|       Multivariate 1k |      1000 |    mooncake |             typed |   true |                982.7 |                 9.1 |
|   Loop univariate 10k |     10000 |    mooncake |             typed |   true |              65631.9 |                 3.8 |
|      Multivariate 10k |     10000 |    mooncake |             typed |   true |               8536.7 |                10.1 |
|               Dynamic |        10 |    mooncake |             typed |   true |                134.7 |                11.4 |
|              Submodel |         1 |    mooncake |             typed |   true |                 14.1 |                 4.7 |
|                   LDA |        12 | reversediff |             typed |   true |               1207.3 |                 2.3 |

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.34%. Comparing base (3db45ee) to head (51383c2).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1046   +/-   ##
=======================================
  Coverage   82.34%   82.34%           
=======================================
  Files          38       38           
  Lines        3949     3949           
=======================================
  Hits         3252     3252           
  Misses        697      697           

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[penelopeysm]

Silly mistake, should pin test dep not the main project dep.

[github-actions]

DynamicPPL.jl documentation for PR #1046 is available at:
https://TuringLang.github.io/DynamicPPL.jl/previews/PR1046/