Metadata filters crash on keys containing dots or other special characters #3179

Describe the bug

Filtering seeds or message pieces by a prompt_metadata key that contains a dot (or any character outside a plain SQL bind name, like a hyphen or a space) crashes the query instead of filtering.

In sqlite_memory.py and azure_sql_memory.py, _get_seed_metadata_conditions and _get_message_pieces_prompt_metadata_conditions build the SQL with the key interpolated into both the JSON path and the bind parameter name:

f"JSON_EXTRACT(prompt_metadata, '$.{key}') = :{key}"

For a key like a.b, SQLAlchemy parses :a.b as a parameter named a followed by literal text, so the later bindparams() call raises ArgumentError: This text() construct doesn't define a bound parameter named 'a.b'.

This is the same class of problem #3063 fixed for memory labels, where the accepted fix quotes the JSON path and uses indexed parameter names.

Steps/Code to Reproduce

import asyncio, tempfile
from pyrit.memory.sqlite_memory import SQLiteMemory
from pyrit.models import SeedPrompt

async def main():
    memory = SQLiteMemory(db_path=tempfile.mktemp(suffix=".db"), verbose=False)
    await memory.add_seeds_to_memory_async(seeds=[
        SeedPrompt(value="dotted", data_type="text", dataset_name="t", metadata={"a.b": "v1"}),
    ], added_by="repro")
    got = await memory.get_seeds_async(metadata={"a.b": "v1"})  # raises ArgumentError
    print(got)

asyncio.run(main())

Expected Results

The filter matches the stored seed by the literal metadata key a.b and returns it.

Actual Results

sqlalchemy.exc.ArgumentError: This text() construct doesn't define a bound parameter named 'a.b'

Screenshots

N/A

Versions

OS: macOS
Python version: 3.14
PyRIT version: installed from main (66c41fa)