[PW_SID:1086807] network: add externally managed profiles

[IWDTestBot]

Add [Settings].ExternallyManaged for network profiles whose contents
are owned by another network manager. IWD still reads these profiles
for connection setup, but avoids updating them as a side effect of
network operation.

Skip connection timestamp/profile writes, security cache writes,
automatic profile encryption rewrites, and KnownNetwork AutoConnect
persistence for externally managed profiles. Explicit Forget remains
available through the existing removal path.

Add storage tests covering the existing encryption rewrite path and
the externally managed no-rewrite case.

src/knownnetworks.c | 8 ++++
src/knownnetworks.h | 2 +
src/network.c | 67 +++++++++++++++++++-------
src/storage.c | 17 ++++++-
unit/test-storage.c | 114 +++++++++++++++++++++++++++++++++++++++++++-
5 files changed, 188 insertions(+), 20 deletions(-)

[IWDTestBot]

Fetch PR
Test ID: fetch
Desc: Fetch the PR commits for this CI run
Duration: 3.66 seconds
Result: PASS

Prep - Setup ELL
Test ID: setupell
Desc: Clone, build, and install ELL
Duration: 26.38 seconds
Result: PASS

Make Distcheck
Test ID: makedistcheck
Desc: Run distcheck to check the distribution
Duration: 56.60 seconds
Result: PASS

Build - Configure
Test ID: build
Desc: Configure the BlueZ source tree
Duration: 12.19 seconds
Result: PASS

Make Check
Test ID: makecheck
Desc: Run 'make check'
Duration: 3.30 seconds
Result: PASS

Make Check w/Valgrind
Test ID: makecheckvalgrind
Desc: Run 'make check' with Valgrind
Duration: 105.71 seconds
Result: PASS

Incremental Build with patches
Test ID: incremental_build
Desc: Incremental build per patch in the series
Duration: 149.82 seconds
Result: PASS

[IWDTestBot]

Fetch PR
Test ID: fetch
Desc: Fetch the PR commits for this CI run
Duration: 2.73 seconds
Result: PASS

GitLint
Test ID: gitlint
Desc: Run gitlint with rule in .gitlint
Duration: 1.23 seconds
Result: PASS

Prep - Setup ELL
Test ID: setupell
Desc: Clone, build, and install ELL
Duration: 28.80 seconds
Result: PASS

Make Distcheck
Test ID: makedistcheck
Desc: Run distcheck to check the distribution
Duration: 40.87 seconds
Result: PASS

Build - Configure
Test ID: build
Desc: Configure the BlueZ source tree
Duration: 22.96 seconds
Result: PASS

Make Check
Test ID: makecheck
Desc: Run 'make check'
Duration: 6.14 seconds
Result: PASS

Make Check w/Valgrind
Test ID: makecheckvalgrind
Desc: Run 'make check' with Valgrind
Duration: 128.97 seconds
Result: PASS

Incremental Build with patches
Test ID: incremental_build
Desc: Incremental build per patch in the series
Duration: 185.91 seconds
Result: PASS

Autotest Runner
Test ID: testrunner
Desc: Runs IWD's autotest framework
Duration: 2363.18 seconds
Result: PASS

Clang Build
Test ID: clang
Desc: Build IWD using clang compiler
Duration: 132.04 seconds
Result: PASS