refactor(embedding): replace providers with octolib integration

- Remove OpenAI, HuggingFace, FastEmbed, Google, and Jina providers
- Delete legacy embedding modules, tests, and related features
- Introduce octolib crate for centralized embedding support
- Refactor embedding generation and batching to use octolib APIs
- Add compatibility types and unified embedding config struct
- Move token counting, batching, and hashing utilities to octolib
- Upgrade Rust toolchain to 1.91.1 and synchronize dependencies

Author: donhardman

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Install Rust
-      uses: dtolnay/rust-toolchain@1.87.0
+      uses: dtolnay/rust-toolchain@1.91.1
       with:
         components: rustfmt, clippy
 
@@ -50,7 +50,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Install Rust
-      uses: dtolnay/rust-toolchain@1.87.0
+      uses: dtolnay/rust-toolchain@1.91.1
       with:
         components: rustfmt
 
@@ -65,7 +65,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Install Rust
-      uses: dtolnay/rust-toolchain@1.87.0
+      uses: dtolnay/rust-toolchain@1.91.1
       with:
         components: clippy
 
@@ -94,7 +94,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        rust: [1.87.0]
+        rust: [1.91.1]
         include:
           - os: ubuntu-latest
             rust: beta
@@ -152,7 +152,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Install Rust
-      uses: dtolnay/rust-toolchain@1.87.0
+      uses: dtolnay/rust-toolchain@1.91.1
 
     - name: Install protobuf compiler
       run: |
@@ -173,7 +173,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Install Rust
-      uses: dtolnay/rust-toolchain@1.87.0
+      uses: dtolnay/rust-toolchain@1.91.1
 
     - name: Install protobuf compiler
       run: |
@@ -202,4 +202,4 @@ jobs:
       uses: codecov/codecov-action@v4
       with:
         file: ./cobertura.xml
-        fail_ci_if_error: false
+        fail_ci_if_error: false

.github/workflows/dependencies.yml

@@ -20,7 +20,7 @@ jobs:
         token: ${{ secrets.GITHUB_TOKEN }}
 
     - name: Install Rust
-      uses: dtolnay/rust-toolchain@1.87.0
+      uses: dtolnay/rust-toolchain@1.91.1
 
     - name: Install protobuf compiler
       run: |
@@ -75,4 +75,4 @@ jobs:
 
           This PR was automatically created by the dependency update workflow.
         branch: chore/update-dependencies
-        delete-branch: true
+        delete-branch: true

.github/workflows/release.yml

@@ -158,7 +158,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Install Rust
-      uses: dtolnay/rust-toolchain@1.87.0
+      uses: dtolnay/rust-toolchain@1.91.1
       with:
         targets: ${{ matrix.target }}
 
@@ -192,7 +192,7 @@ jobs:
           docker run --rm \
             -v "$(pwd):/workspace" \
             -w /workspace \
-            rust:1.87.0-alpine3.21 \
+            rust:1.91.1-alpine3.21 \
             sh -c "
               apk add --no-cache musl-dev openssl-dev openssl-libs-static pkgconfig gcc g++ protobuf-dev && \
               rustup target add ${{ matrix.target }} && \
@@ -249,7 +249,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Install Rust
-      uses: dtolnay/rust-toolchain@1.87.0
+      uses: dtolnay/rust-toolchain@1.91.1
 
     - name: Install protobuf compiler
       run: |
@@ -411,4 +411,4 @@ jobs:
           ghcr.io/${{ steps.repo.outputs.repository }}:latest
           ghcr.io/${{ steps.repo.outputs.repository }}:${{ needs.create-release.outputs.version }}
         cache-from: type=gha
-        cache-to: type=gha,mode=max
+        cache-to: type=gha,mode=max