Goose Session Panic on Startup

**Describe the bug**

I encounter a panic when trying to create a new session on v1.10.2.  Everything worked in v1.8.0, but started breaking after the upgrade.  Could reproduce in a clean container and after emptying `~/.config/goose`.

**To Reproduce**
Steps to reproduce the behavior:
1. Build and run the below container
2. Configure your provider (I only have access to Copilot)
3. Run `goose` or `goose session`
4. See error

**Expected behavior**

I expected to be able to start a Goose session without encountering Rust panics.

**Screenshots**
See below log.

**Please provide following information:**
 - **OS & Arch:** Fedora 42 - X86_64
 - **Interface:** CLI
 - **Version:** v1.10.2
 - **Extensions enabled:** None
 - **Provider & Model:** GitHub Copilot, Grok code fast 1

**Additional context**

```
Repos/rsturla/mcp-server-rpm 
❯ goose       
starting session | provider: github_copilot model: grok-code-fast-1
    logging to /var/home/admin/.local/share/goose/sessions/20251016_021845.jsonl
    working directory: /var/home/admin/Repos/rsturla/mcp-server-rpm

Goose is running! Enter your instructions, or try asking what goose can do.

Context: ○○○○○○○○○○ 0% (0/131072 tokens)
( O)> Press Enter to send, Ctrl-J for new line

Closing session. Recorded to /var/home/admin/.local/share/goose/sessions/20251016_021845.jsonl

Repos/rsturla/mcp-server-rpm 
❯ goose --version
 1.8.0

Repos/rsturla/mcp-server-rpm 
❯ goose update   
WINDIR: <not set>
OSTYPE: linux-gnu
uname -s: Linux
uname -m: x86_64
PWD: /var/home/admin/Repos/rsturla/mcp-server-rpm
Detected OS: linux with ARCH x86_64
Downloading stable release: goose-x86_64-unknown-linux-gnu.tar.bz2...
Extracting goose-x86_64-unknown-linux-gnu.tar.bz2 to temporary directory...
Moving goose to /var/home/admin/.local/bin/goose
Moving temporal-service to /var/home/admin/.local/bin/temporal-service
Moving temporal CLI to /var/home/admin/.local/bin/temporal
Skipping 'goose configure', you may need to run this manually later

Repos/rsturla/mcp-server-rpm took 15s 
❯ goose --version
 1.10.2

Repos/rsturla/mcp-server-rpm 
❯ goose          

thread 'main' panicked at crates/goose-cli/src/session/mod.rs:136:26:
called `Result::unwrap()` on an `Err` value: Session not found
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Repos/rsturla/mcp-server-rpm 
❯ goose session

thread 'main' panicked at crates/goose-cli/src/session/mod.rs:136:26:
called `Result::unwrap()` on an `Err` value: Session not found
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
```

Could reproduce on both the F43 host, and a F43 container with the below Containerfile:

```
FROM quay.io/fedora/fedora:43
ARG PYTHON_VERSION=3.14

ENV GOOSE_DISABLE_KEYRING=1

RUN --mount=type=cache,target=/var/cache \
    dnf install -y \
    zsh \
    git \
    jq \
    yq \
    make

RUN --mount=type=cache,target=/var/cache \
    dnf install -y \
    podman-remote \
    python${PYTHON_VERSION} \
    python${PYTHON_VERSION}-pip \
    nodejs \
    npm \
    libxcb

RUN ln -s /usr/bin/podman-remote /usr/bin/podman

RUN --mount=type=cache,target=/var/cache \
    dnf clean all

RUN useradd -ms /usr/bin/zsh vscode && \
    echo "vscode ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers

USER root
RUN mkdir -p /home/vscode && chown -R vscode:vscode /home/vscode

USER vscode
WORKDIR /home/vscode

RUN sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)" "" --unattended --keep-zshrc && \
    git clone https://github.com/zsh-users/zsh-syntax-highlighting.git ${ZSH_CUSTOM:-/home/vscode/.oh-my-zsh/custom}/plugins/zsh-syntax-highlighting && \
    git clone https://github.com/zsh-users/zsh-autosuggestions ${ZSH_CUSTOM:-/home/vscode/.oh-my-zsh/custom}/plugins/zsh-autosuggestions

RUN curl -fsSL https://github.com/block/goose/releases/download/stable/download_cli.sh | CONFIGURE=false bash
```

Full backtrace:

```

thread 'main' panicked at crates/goose-cli/src/session/mod.rs:136:26:
called `Result::unwrap()` on an `Err` value: Session not found

Stack backtrace:
   0: anyhow::error::<impl anyhow::Error>::msg
   1: goose::session::session_manager::SessionManager::get_session::{{closure}}
   2: tokio::runtime::park::CachedParkThread::block_on
   3: tokio::runtime::handle::Handle::block_on
   4: tokio::runtime::scheduler::multi_thread::worker::block_in_place
   5: goose_cli::session::CliSession::new
   6: goose_cli::session::builder::build_session::{{closure}}
   7: goose_cli::cli::cli::{{closure}}
   8: goose::main::{{closure}}
   9: tokio::runtime::park::CachedParkThread::block_on
  10: tokio::runtime::context::runtime::enter_runtime
  11: tokio::runtime::runtime::Runtime::block_on
  12: goose::main
  13: std::sys::backtrace::__rust_begin_short_backtrace
  14: std::rt::lang_start::{{closure}}
  15: std::rt::lang_start_internal
  16: main
  17: __libc_start_call_main
  18: __libc_start_main_alias_1
  19: _start
stack backtrace:
   0:     0x556d813d6742 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h46a716bba2450163
   1:     0x556d814043f3 - core::fmt::write::h275e5980d7008551
   2:     0x556d813d14e3 - std::io::Write::write_fmt::h561a66a0340b6995
   3:     0x556d813d6592 - std::sys::backtrace::BacktraceLock::print::hafb9d5969adc39a0
   4:     0x556d813d8ce2 - std::panicking::default_hook::{{closure}}::hae2e97a5c4b2b777
   5:     0x556d813d8ae5 - std::panicking::default_hook::h3db1b505cfc4eb79
   6:     0x556d813d9682 - std::panicking::rust_panic_with_hook::h409da73ddef13937
   7:     0x556d813d942a - std::panicking::begin_panic_handler::{{closure}}::h159b61b27f96a9c2
   8:     0x556d813d6c39 - std::sys::backtrace::__rust_end_short_backtrace::h5b56844d75e766fc
   9:     0x556d813d90bd - __rustc[4794b31dd7191200]::rust_begin_unwind
  10:     0x556d7dacd190 - core::panicking::panic_fmt::hc8737e8cca20a7c8
  11:     0x556d7dacd5b6 - core::result::unwrap_failed::h727108008d9f4c9b
  12:     0x556d7e43620e - tokio::runtime::park::CachedParkThread::block_on::h6d4600b1658266a7
  13:     0x556d7e535c95 - tokio::runtime::handle::Handle::block_on::h9774b0ca9ce9fac8
  14:     0x556d7e5cb781 - tokio::runtime::scheduler::multi_thread::worker::block_in_place::h956c4334e72d48db
  15:     0x556d7e694d66 - goose_cli::session::CliSession::new::hd67275afcd6f9266
  16:     0x556d7dc61837 - goose_cli::session::builder::build_session::{{closure}}::h489af6a2ac937d53
  17:     0x556d7dc33065 - goose_cli::cli::cli::{{closure}}::h37056f45d0ddab34
  18:     0x556d7dc7bd21 - goose::main::{{closure}}::h1e608445aa31f890
  19:     0x556d7dce4717 - tokio::runtime::park::CachedParkThread::block_on::h90ba70e6f85c6474
  20:     0x556d7e197211 - tokio::runtime::context::runtime::enter_runtime::hce8d4e5f993e8012
  21:     0x556d7e03c7d6 - tokio::runtime::runtime::Runtime::block_on::h8e9f6146dc5c4f75
  22:     0x556d7e39f3be - goose::main::h37c3ac309fbbf991
  23:     0x556d7e33be93 - std::sys::backtrace::__rust_begin_short_backtrace::heb255d3c1a1634e8
  24:     0x556d7e1460fd - std::rt::lang_start::{{closure}}::h437c1679743b1f49
  25:     0x556d813c5314 - std::rt::lang_start_internal::ha8ef919ae4984948
  26:     0x556d7e39f495 - main
  27:     0x7f0642d725b5 - __libc_start_call_main
  28:     0x7f0642d72668 - __libc_start_main_alias_1
  29:     0x556d7dad011e - _start
  30:                0x0 - <unknown>
```

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Goose Session Panic on Startup #5197

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