Move `lightning-transaction-sync` back into the main workspace

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3c50b2a..2658ff4 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -62,52 +62,35 @@ jobs:
       - name: Set RUSTFLAGS to deny warnings
         if: "matrix.toolchain == '1.75.0'"
         run: echo "RUSTFLAGS=-D warnings" >> "$GITHUB_ENV"
-      - name: Run CI script
-        shell: bash # Default on Winblows is powershell
-        run: CI_ENV=1 CI_MINIMIZE_DISK_USAGE=1 ./ci/ci-tests.sh
-
-  build-tx-sync:
-    strategy:
-      fail-fast: false
-      matrix:
-        platform: [ ubuntu-latest, macos-latest ]
-        toolchain: [ stable, beta, 1.75.0 ]
-    runs-on: ${{ matrix.platform }}
-    steps:
-      - name: Checkout source code
-        uses: actions/checkout@v4
-      - name: Install Rust ${{ matrix.toolchain }} toolchain
-        run: |
-          curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --profile=minimal --default-toolchain ${{ matrix.toolchain }}
-      - name: Set RUSTFLAGS to deny warnings
-        if: "matrix.toolchain == '1.75.0'"
-        run: echo "RUSTFLAGS=-D warnings" >> "$GITHUB_ENV"
       - name: Enable caching for bitcoind
+        if: matrix.platform != 'windows-latest'
         id: cache-bitcoind
         uses: actions/cache@v4
         with:
           path: bin/bitcoind-${{ runner.os }}-${{ runner.arch }}
           key: bitcoind-${{ runner.os }}-${{ runner.arch }}
       - name: Enable caching for electrs
+        if: matrix.platform != 'windows-latest'
         id: cache-electrs
         uses: actions/cache@v4
         with:
           path: bin/electrs-${{ runner.os }}-${{ runner.arch }}
           key: electrs-${{ runner.os }}-${{ runner.arch }}
       - name: Download bitcoind/electrs
-        if: "steps.cache-bitcoind.outputs.cache-hit != 'true' || steps.cache-electrs.outputs.cache-hit != 'true'"
+        if: "matrix.platform != 'windows-latest' && (steps.cache-bitcoind.outputs.cache-hit != 'true' || steps.cache-electrs.outputs.cache-hit != 'true')"
         run: |
             source ./contrib/download_bitcoind_electrs.sh
             mkdir bin
             mv "$BITCOIND_EXE" bin/bitcoind-${{ runner.os }}-${{ runner.arch }}
             mv "$ELECTRS_EXE" bin/electrs-${{ runner.os }}-${{ runner.arch }}
       - name: Set bitcoind/electrs environment variables
+        if: matrix.platform != 'windows-latest'
         run: |
             echo "BITCOIND_EXE=$( pwd )/bin/bitcoind-${{ runner.os }}-${{ runner.arch }}" >> "$GITHUB_ENV"
             echo "ELECTRS_EXE=$( pwd )/bin/electrs-${{ runner.os }}-${{ runner.arch }}" >> "$GITHUB_ENV"
       - name: Run CI script
         shell: bash # Default on Winblows is powershell
-        run: CI_ENV=1 CI_MINIMIZE_DISK_USAGE=1 ./ci/ci-tx-sync-tests.sh
+        run: CI_ENV=1 CI_MINIMIZE_DISK_USAGE=1 ./ci/ci-tests.sh
 
   coverage:
     needs: fuzz
diff --git a/Cargo.toml b/Cargo.toml
index f9f7406..a0895fe 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,11 +16,11 @@ members = [
     "lightning-macros",
     "lightning-dns-resolver",
     "lightning-liquidity",
+    "lightning-transaction-sync",
     "possiblyrandom",
 ]
 
 exclude = [
-    "lightning-transaction-sync",
     "lightning-tests",
     "ext-functional-test-demo",
     "no-std-check",
diff --git a/ci/ci-tests.sh b/ci/ci-tests.sh
index 91ead99..488c5ac 100755
--- a/ci/ci-tests.sh
+++ b/ci/ci-tests.sh
@@ -2,7 +2,6 @@
 #shellcheck disable=SC2002,SC2207
 set -eox pipefail
 
-# Currently unused as we don't have to pin anything for MSRV:
 RUSTC_MINOR_VERSION=$(rustc --version | awk '{ split($2,a,"."); print a[2] }')
 
 # Some crates require pinning to meet our MSRV even for our downstream users,
@@ -20,6 +19,9 @@ PIN_RELEASE_DEPS # pin the release dependencies in our main workspace
 # proptest 1.9.0 requires rustc 1.82.0
 [ "$RUSTC_MINOR_VERSION" -lt 82 ] && cargo update -p proptest --precise "1.8.0" --verbose
 
+# Starting with version 1.2.0, the `idna_adapter` crate has an MSRV of rustc 1.81.0.
+[ "$RUSTC_MINOR_VERSION" -lt 81 ] && cargo update -p idna_adapter --precise "1.1.0" --verbose
+
 export RUST_BACKTRACE=1
 
 echo -e "\n\nChecking the workspace, except lightning-transaction-sync."
@@ -57,6 +59,23 @@ cargo check -p lightning-block-sync --verbose --color always --features rpc-clie
 cargo test -p lightning-block-sync --verbose --color always --features rpc-client,rest-client,tokio
 cargo check -p lightning-block-sync --verbose --color always --features rpc-client,rest-client,tokio
 
+echo -e "\n\nChecking Transaction Sync Clients with features."
+cargo check -p lightning-transaction-sync --verbose --color always --features esplora-blocking
+cargo check -p lightning-transaction-sync --verbose --color always --features esplora-async
+cargo check -p lightning-transaction-sync --verbose --color always --features esplora-async-https
+cargo check -p lightning-transaction-sync --verbose --color always --features electrum
+
+if [ -z "$CI_ENV" ] && [[ -z "$BITCOIND_EXE" || -z "$ELECTRS_EXE" ]]; then
+	echo -e "\n\nSkipping testing Transaction Sync Clients due to BITCOIND_EXE or ELECTRS_EXE being unset."
+	cargo check -p lightning-transaction-sync --tests
+else
+	echo -e "\n\nTesting Transaction Sync Clients with features."
+	cargo test -p lightning-transaction-sync --verbose --color always --features esplora-blocking
+	cargo test -p lightning-transaction-sync --verbose --color always --features esplora-async
+	cargo test -p lightning-transaction-sync --verbose --color always --features esplora-async-https
+	cargo test -p lightning-transaction-sync --verbose --color always --features electrum
+fi
+
 echo -e "\n\nChecking and testing lightning-persister with features"
 cargo test -p lightning-persister --verbose --color always --features tokio
 cargo check -p lightning-persister --verbose --color always --features tokio
diff --git a/ci/ci-tx-sync-tests.sh b/ci/ci-tx-sync-tests.sh
deleted file mode 100755
index 0839e2c..0000000
--- a/ci/ci-tx-sync-tests.sh
+++ /dev/null
@@ -1,39 +0,0 @@
-#!/bin/bash
-set -eox pipefail
-
-RUSTC_MINOR_VERSION=$(rustc --version | awk '{ split($2,a,"."); print a[2] }')
-
-pushd lightning-transaction-sync
-
-# Some crates require pinning to meet our MSRV even for our downstream users,
-# which we do here.
-# Further crates which appear only as dev-dependencies are pinned further down.
-function PIN_RELEASE_DEPS {
-	return 0 # Don't fail the script if our rustc is higher than the last check
-}
-
-PIN_RELEASE_DEPS # pin the release dependencies
-
-# Starting with version 1.2.0, the `idna_adapter` crate has an MSRV of rustc 1.81.0.
-[ "$RUSTC_MINOR_VERSION" -lt 81 ] && cargo update -p idna_adapter --precise "1.1.0" --verbose
-
-export RUST_BACKTRACE=1
-
-echo -e "\n\nChecking Transaction Sync Clients with features."
-cargo check --verbose --color always --features esplora-blocking
-cargo check --verbose --color always --features esplora-async
-cargo check --verbose --color always --features esplora-async-https
-cargo check --verbose --color always --features electrum
-
-if [ -z "$CI_ENV" ] && [[ -z "$BITCOIND_EXE" || -z "$ELECTRS_EXE" ]]; then
-	echo -e "\n\nSkipping testing Transaction Sync Clients due to BITCOIND_EXE or ELECTRS_EXE being unset."
-	cargo check --tests
-else
-	echo -e "\n\nTesting Transaction Sync Clients with features."
-	cargo test --verbose --color always --features esplora-blocking
-	cargo test --verbose --color always --features esplora-async
-	cargo test --verbose --color always --features esplora-async-https
-	cargo test --verbose --color always --features electrum
-fi
-
-popd