Skip resolution for frozen no-sync add

[ReinerBRO]

Fixes #3372.\n\nWhen 0:00:00 🔒 Lock successful.
Changes are written to pyproject.toml.
Synchronizing working set with resolved packages: 81 to add, 0 to update, 0 to remove

✔ Install setuptools 80.9.0 successful
✔ Install anysqlite 0.0.5 successful
✔ Install distlib 0.4.0 successful
✔ Install arpeggio 2.0.3 successful
✔ Install blinker 1.9.0 successful
✔ Install cachetools 6.2.3 successful
✔ Install deepmerge 2.0 successful
✔ Install colorama 0.4.6 successful
✔ Install dep-logic 0.5.2 successful
✔ Install execnet 2.1.2 successful
✔ Install attrs 25.4.0 successful
✔ Install click 8.1.8 successful
✔ Install findpython 0.7.1 successful
✔ Install anyio 4.12.0 successful
✔ Install certifi 2025.11.12 successful
✔ Install chardet 5.2.0 successful
✔ Install filelock 3.19.1 successful
✔ Install ghp-import 2.1.0 successful
✔ Install h11 0.16.0 successful
✔ Install id 1.5.0 successful
✔ Install httpx 0.28.1 successful
✔ Install httpcore 1.0.9 successful
✔ Install idna 3.11 successful
✔ Install coverage 7.10.7 successful
✔ Install hishel 1.1.8 successful
✔ Install markdown-it-py 3.0.0 successful
✔ Install markdown 3.9 successful
✔ Install mdurl 0.1.2 successful
✔ Install griffe 1.14.0 successful
✔ Install charset-normalizer 3.4.4 successful
✔ Install mergedeep 1.3.4 successful
✔ Install mkdocs-get-deps 0.2.0 successful
✔ Install mkdocs-autorefs 1.4.3 successful
✔ Install iniconfig 2.1.0 successful
✔ Install mkdocstrings 0.30.1 successful
✔ Install markupsafe 3.0.3 successful
✔ Install parver 0.5 successful
✔ Install packaging 26.0 successful
✔ Install mkdocstrings-python 1.18.2 successful
✔ Install jinja2 3.1.6 successful
✔ Install installer 0.7.0 successful
✔ Install pathspec 0.12.1 successful
✔ Install pluggy 1.6.0 successful
✔ Install pbs-installer 2025.12.5 successful
✔ Install platformdirs 4.4.0 successful
✔ Install msgpack 1.1.2 successful
✔ Install pyproject-api 1.9.1 successful
✔ Install pyproject-hooks 1.2.0 successful
✔ Install pytest-cov 7.0.0 successful
✔ Install pytest-httpserver 1.1.3 successful
✔ Install pymdown-extensions 10.19.1 successful
✔ Install pytest-httpx 0.35.0 successful
✔ Install pytest-mock 3.15.1 successful
✔ Install pytest-rerunfailures 16.0.1 successful
✔ Install mkdocs 1.6.1 successful
✔ Install pytest-xdist 3.8.0 successful
✔ Install python-dotenv 1.2.1 successful
✔ Install pycomplete 0.4.0 successful
✔ Install pytest 8.4.2 successful
✔ Install pyyaml-env-tag 1.1 successful
✔ Install resolvelib 1.2.1 successful
✔ Install pygments 2.19.2 successful
✔ Install socksio 1.0.0 successful
✔ Install pyyaml 6.0.3 successful
✔ Install shellingham 1.5.4 successful
✔ Install six 1.17.0 successful
✔ Install requests 2.32.5 successful
✔ Install tomlkit 0.13.3 successful
✔ Install rich 14.2.0 successful
✔ Install towncrier 25.8.0 successful
✔ Install tox-pdm 0.7.2 successful
✔ Install truststore 0.10.4 successful
✔ Install unearth 0.18.1 successful
✔ Install typing-extensions 4.15.0 successful
✔ Install tox 4.30.3 successful
✔ Install urllib3 2.6.2 successful
✔ Install watchdog 6.0.0 successful
✔ Install python-dateutil 2.9.0.post0 successful
✔ Install virtualenv 20.35.4 successful
✔ Install werkzeug 3.1.4 successful
✔ Install zensical 0.0.28 successful
✔ Install pdm 2.26.8.dev1+g68906436 successful

0:00:11 🎉 All complete! 81/81 is run with both and , the command now skips the resolver entirely and only updates pyproject.toml. This keeps no-sync behavior intact while avoiding an unnecessary lock attempt under a frozen lockfile.

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 86.12%. Comparing base (e96d535) to head (6890643).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
src/pdm/cli/commands/add.py	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3755      +/-   ##
==========================================
- Coverage   86.12%   86.12%   -0.01%     
==========================================
  Files         118      118              
  Lines       12406    12410       +4     
  Branches     2071     2073       +2     
==========================================
+ Hits        10685    10688       +3     
  Misses       1150     1150              
- Partials      571      572       +1     

Flag	Coverage Δ
unittests	85.97% <75.00%> (-0.01%)	⬇️

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